Human Factors Expert Witnesses
The SEAK Expert Witness Directory contains a comprehensive list of human factors expert witnesses who testify, consult and provide litigation support on human factors and related issues. Human factors expert witnesses and consultants on this page may form expert opinions, draft expert witness reports, and provide expert witness testimony at deposition and trial. The issues and subjects these human factors expert witnesses testify regarding may include: Human Factors, Premises Liability, OSHA, Slip Trip & Fall, Ergonomics, Accident Investigation, Accident Reconstruction, Biomechanics, Failure Analysis, Product Liability, Safety, Construction, Pilot Error, Products Liability, and Warnings.
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Craig Rosenberg, Ph.D.
User Interface, Software Engineering, VR, AR, GPS
UI.EXPERT
Human Factors, Software Engineering
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user interface, user interface design, mobile software, smartphones, software, software engineering, software architecture, virtual reality, augmented reality, GPS, human factors, display design, virtual environments, augmented environments, systems engineering, simulation, software development, UI, User Interface
Dr. Rosenberg has been retained over 160 times, has testified at 12 trials in both State and Federal courts, testified at over 60 depositions, and has written over 140 expert reports and declarations.
Dr. Craig Rosenberg has worked on many high-profile cases and advanced engineering projects for a wide range of Fortune 500 companies including Google, Samsung, Amazon, Boeing, IBM, Disney, Uber, Lyft, Huawei, Nintendo, BMW, Mercedes, Dell, AT&T, Zillow, Motorola, BlackBerry, Ericsson, LG, Sony, HTC, Mattel, United States Army and Air Force, Federal Aviation Administration and many others.
Dr. Rosenberg is the founder of Global Technica and is an accomplished human factors engineer, user interface designer, software engineer, and systems engineer with extensive expert witness experience specializing in user interface design and human factors issues for embedded, mobile, web, desktop, and server software.
Dr. Rosenberg specializes in software engineering, user interface design, infor...
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Kevin A Rider, PhD, PE, CHFP
Human Factors Expert
Forensic Human Factors, LLC
Human Factors, Traffic Engineering
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Distracted driving, Driving behavior, Reconstruction, Biomechanics, Maritime, Manufacturing, Mining, OSHA, Premises Liability, Products Liability, Safety, Slips, Trips, Falls, Transportation, Warnings, Conspicuity, Cell phones, Texting, Lighting
Dr. Kevin Rider is a human factors expert and owner of Forensic Human Factors, LLC, providing investigations, reports and expert testimony for personal injury cases – plaintiff and defense. His expertise involves investigating how people interact with other people, products and environments in predictable ways, and applying this understanding to effective, efficient and safe products, services and systems. He has been consulted as an expert in 49 states (so far).
Dr. Rider’s expertise includes:
• MVAs and pedestrian collisions, incl. trucks, trains, buses, motor/bicycles
• Illumination, nighttime visibility, and conspicuity
• DUI/DWIs, where intoxication was not a proximate cause of crash
• Adequacy of product designs and warnings
• The design and maintenance of safe civil and occupational environments
• Premises liability, and slips, trips and falls
• Workplace and construction safety
Dr. Rider is a Professional Engineer (PE), a Certified Human Factors Professional (CHFP), and ...
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Victoria Ballard, PhD, MSE, PE, CSP, CHFP
Forensic Human Factors-Multidisciplined Engineer
Forensic Human Factors, LLC
Opelika, Alabama
Human Factors, Safety
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Slips Trips Falls, Cognitive Engineering, Education Schools Youth Organizations, Manufacturing - Guarding Exposure Training Fall Protection OSHA, Ergonomics, ADA, Premises Liability, Product Liability, Warnings and Labels, Occupational Safety, Agriculture- Poultry Horses, Walkway Auditing, Lock Out Tag Out (LOTO), OSHA
Dr. Victoria Ballard, MSE, PE, CSP, CHFP, is an industrial and systems engineering expert specializing in human factors, occupational safety, and forensic analysis. With over sixteen years of experience as a consultant and educator. As a consultant, she provides investigations, reports, and expert analysis in legal cases involving workplace safety, human performance, product design, and environmental factors. She applies her expertise to analyze how individuals interact with products, environments, and occupational systems, offering clear and data-driven insights into accident causation and prevention.
Dr. Ballard has held engineering roles in chemical manufacturing, civil engineering, construction, and industrial safety, ensuring compliance, risk mitigation, and system optimization. She has served in various roles such as Adjunct Faculty, Graduate Researcher, Graduate Teaching Assistant, and Fellow at seven universities (University of Washington, Embry-Riddle Aeronautical Universi...
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James A Copple, BEng, RAF (Ret’d)
Aviation Expert - Former Military Pilot
Fairbanks, Alaska
Aviation & Aerospace, Human Factors
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Aircraft Accident Investigation, Small Unmanned Aircraft Systems, Aircraft, sUAS, Airmanship, Flight Instruction, Aircrew Performance
40 manned and unmanned aircraft types in a combination of military and civilian capacities, accumulating over 5,500 flight hours. Piston, turboprop, fast-jet, transport and Remotely-Piloted experience. 5 tours as military flying instructor based in the UK, Pakistan and the USA. Research Specialist at the University of Alaska Fairbanks with the Alaska Center for UAS Integration. Current Commercial Remote Pilot’s Licence, Private Pilot.
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Christina M Lewis, PhD
Human Factors Consultant | Cognitive Engineer
Forensic Human Factors, LLC
Phoenix, Arizona
Human Factors
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Distracted Driving, In-Vehicle Distractions, Human Error, Workload, Driver Perception & Attention
Dr. Lewis has spent over 12 years researching cognitive neuroscience and engineering psychology, initially working in multiple laboratories at the University of California, San Diego (UCSD), where she coordinated research projects on human motor control and erred behavior. She then worked as an associate researcher in the neuropsychology departments of two different hospitals, contributing to studies about the limits of human cognitive abilities in attention and memory. The related issues of cognitive tunneling are regularly demonstrated by individuals whose focus may prevent them from recognizing other salient cues. Dr. Lewis then transitioned to graduate research at Arizona State University (ASU) in the field of engineering psychology, aiming to connect fundamentals from cognitive neuroscience principles towards more applied settings. This includes research geared towards operator behavior in tasks such as driving, piloting, and military operations. Her work has been concentrated ...
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Robert T McCarthy
Career railroad officer - Subject matter expert
TotalRail, LLC
Rio Rico, Arizona
Railroad, Accident Reconstruction
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Event Recorder, Locomotive GE/EMD, Positive Train Control, Train make-up, LDVR camera, Trip Optimizer/Leader, Distributed Power Locomotive, Federal Regulations, Railroad Operating Rules, Crossing collisions, Railroad training, Derailment, Employee discipline, Passenger/Freight operations, Fatalities, Employee injury, Human Factors
Railroad Safety & Accident Reconstruction Expert | Locomotive Engineer | Former FRA Investigator
Nationally recognized railroad safety and operations expert with over 40 years of Class I passenger and freight railroad experience. Current Class I locomotive engineer and certified Supervisor of Locomotive Engineers. Former Class I railroad executive and Federal Railroad Administration (FRA) investigator.
Trained by both the FRA and National Transportation Safety Board (NTSB) in advanced post-incident and accident investigation techniques. Expert in reconstructing complex incidents — including train–vehicle collisions, train–pedestrian/trespasser strikes, improper train make-up, and rules violations. Skilled in cutting-edge event recorder and locomotive camera analysis software.
Proven track record in high-profile and multi-fatality investigations. Founder of TotalRail, LLC (est. 2018), recognized for uncompromising, detail-driven investigations and authoritative subject matter expe...
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Jonathan S. Lee-Confer, PhD
Biomechanist - Univ. Arizona Professor
Verum Biomechanics
Tucson, Arizona
Biomechanics, Premises Liability
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Slips, Trips, Falls, ADA, Biomechanics, Injury Causation, Slip-Resistance Testing (tribometers), Pedestrian Reconstruction, OSHA, ASTM, Code Compliance, Building Codes, Stairs, Walkways, Awareness, Visual Detection, Human Factors, Gait, Hazard Warnings, Walking
Dr. Lee-Confer is a biomechanical expert specializing in injury causation, human movement, and walkway safety. As Director of Biomechanics at Verum Biomechanics and Assistant Professor at the University of Arizona, he combines academic research with practical litigation support.
His expertise spans:
Slip, trip and fall biomechanics (injury biomechanics)
Floor slip resistance testing (tribometers)
Gait analysis and movement dynamics
Code compliance (ASTM, ADA, IBC)
Premises liability and safety standards
A contributing author to ASTM F2508-16e, the standard for tribometer validation, Dr. Lee-Confer’s work directly informs measurement of walkway slip resistance—a key factor in many slip-and-fall cases. He also played an instrumental role in Arizona Senate Bill SB1373, advancing fall prevention measures.
Dr. Lee-Confer holds a Ph.D. in Biomechanics from the University of Southern California, with specialized research in slip detection, motor control, cause of injury to anatomic...
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Leslie Weintraub, OD
Forensic Visibility Expert & Medical Optometry
Tucson, Arizona
Optometry, Human Factors
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Forensic Visibiity, Malpractice, Human Factors, Conspicuity, HGN, DUI, DWI, Forensic Vision, Optometric Malpractice, Eye disease, Alcohol and HGN, Forensic vision and accident, Discernibility, Medical Optometry, Reaction Time, Perception, Glare, Accident Reconstruction Visibility
Dr. Leslie Weintraub, O.D.
Board Certified Medical Optometrist and Forensic Visibility consultation/expert witness services for the plaintiff or defense.
• Optometric medical malpractice, over 30 years of clinical experience
• Forensic Visibility, dynamic VA, conspicuity and discernibility evaluation for automobile, commercial vehicles, pedestrian, bicycle and train accidents
• Accident Reconstruction Visibility
• HGN/DUI
• Speaker/educator and author in publications involving visibility and automobile highway safety, bicycle and train accident reconstruction and HGN/DUI
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David Paulus, PhD, PE
Mechanical Engineering & Human Factors Expert
Paulus Consulting, LLC
Fort Smith, Arkansas
Engineering, Intellectual Property
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Mechanical Engineering Expert, Intellectual Property, Patent Validity, Human Factors Expert, Product Liability, Mechanical Design Expert Witness, Patent Litigation, Safety, Patent Infringement Expert, Industrial Engineering Expert
Dr. David C. Paulus is a nationally recognized expert in mechanical engineering, human factors, and product design, with over two decades of academic, research, and litigation consulting experience. He holds a Ph.D. in Mechanical Engineering from Colorado State University, complemented by a Master’s in Industrial Engineering and a Bachelor's in Mechanical Engineering from the University of Tennessee. He currently serves as a Professor of Practice and Director of Graduate Programs in Engineering and Operations Management at the University of Arkansas, Dr. Paulus is a Professional Engineer (PE) and Certified Human Factors Engineering Professional (CHFEP).
Dr. Paulus offers an exceptional blend of technical depth and legal acumen, having served as an expert witness in over 30 product liability and patent litigation matters, including high-profile cases involving Peloton, Big Ass Fans, ICON Health & Fitness, and Mad Dogg Athletics, among others. His expert testimony spans federal and ...
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Jose J. Granda, PhD, PE
Cadsim Engineering
Sacramento, California
Accident Reconstruction, Engineering
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Mechanical Engineering, Auto Accidents, Accident Biomechanics, EDR download, analysis, including TESLA, Work Place Accidents, Heavy Vehicles, Motorcycles, Pedestrians, Bicycles, Failure Analysis, Computer Models, Simulations, Finite Element Modeling (FEA), Human Factors, Vehicle Dynamics and Design
QUALIFICATIONS; Professor of Mechanical Engineering at the California State University in Sacramento, CA with 39+ yrs. experience. Professional Registered Mechanical Engineer (PE License, CA). An expert in accident reconstruction using computer simulations of accidents involving vehicles, trucks, heavy vehicles, motorcycles, biomechanics, pedestrians, bicycles, occupational, workplace, failure analysis impact forces, industrial accidents. EDR (Event Data Recorder) analysis including TESLA vehicles, patents.
EXPERT WITNESS EXPERIENCE: Written reports, depositions & trial experience.
SPECIALIZED TRAINING; Vehicle Dynamics and Design, Vehicle Safety & Crash Reconstruction, Accident Biomechanics, Finite Element Modeling in Computer Aided Design, Advanced Mechanical Design and Failure Analysis (CSUS); Motorcycle Accident reconstruction, (Northwestern University); EDR Certification, Tech 1, Tech II, EDR Analysis Certification (Collision Safety Institute); Applying Automotive EDR Da...
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Joseph R Travers
Newport Beach, California
Products Liability, Manufacturing
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Fitness, Fitness Equipment, Gym, Treadmill, Bicycle, Group Cycle, Spinning, Strength Training, Weight Training, Product Quality, Asia Manufacturing, Human Factors, FMEA, DFMA, Design for Serviceability, Products Liability, Premises Liability, IP Litigation , Patent Litigation
Over 25 years in the fitness equipment and bicycle industries bringing to the table a well-rounded professional perspective. From Mechanical Engineer designing products to head of Product Development & Quality ensuring manufacturing process and sourcing excellence, my expertise covers a wide spectrum of technical disciplines. With experience in technical field service training and being an avid user of fitness and bicycle equipment, I can also relate well with the plaintiff’s side of a product liabilities claim. I have provided testimony and sat as the most knowledgeable defense party on over 65 depositions as well as participated in mediations and litigations in the states of Alabama, Arizona, California, Colorado, Florida, New Jersey, New York, Texas as well as well as internationally in Canada, China, and Hong Kong.
During college and after graduation, I was employed as a Mechanical Designer then Mechanical Engineer in the bike industry for Profile Design & Primo Products. I...
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Kenneth A. Solomon, Ph.D., P.E., Post Ph.D.
Institute of Risk & Safety Analyses
Woodland Hills, California
Biomechanics, Accident Reconstruction
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Human Factors, Animations, 3D Scans, Photometrics
Specialized forensic staff, broad range of consulting and expert testimony, 47 years of courtroom experience for Dr. Solomon, combined courtroom experience for company 334 person years. Accident reconstruction, biomechanics, human factors, safety, accident prevention, adequacy of warnings, computer animation and simulations, 3D scanning & photometric analyses, drone photography, construction defect, criminal defense, criminal prosecution, premises, product integrity, product liability, product testing, warnings, and lost income calculations. Auto, bicycle, bus, chair, elevator, escalator, forklift, gate, ladder, machinery, motorcycle, press, recreational equipment, roller coaster, slip/trip and fall, stairs, swimming pool, and truck. Litigation and claims, defense/plaintiff, educational seminars, and mediation and arbitration services.
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Peter DeNucci
Aviation accident investigator discovering RCCA
Apollo Publihing, Inc.
San Diego, California
Aviation & Aerospace, Human Factors
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Aviation, Airline, Root Cause, Human Factors, Aeronautics, Unmanned Aircraft, Systems Engineering
Peter DeNucci is an accomplished US Airways Captain (ret) having logged over 18,000 hours in numerous Boeing and Airbus aircraft. Most recently he flew as Senior Principal test pilot for Northrop Grumman and the Air force with the HALE unmanned division, where he insured the Root Cause procedures were correctly implemented.
Peter is the author of several books focusing on Safety Culture and change management. These books were the foundation of airline transformations in the cockpit during the past 30 years. Captain Sullenberger (Sully) and Captain DeNucci were flying US Airway’s planes during the initiation of Human Factors and Safety Culture in 1991. While Sully was teaching in universities, Peter was teaching at US Airways and Hospitals. In fact, if you have seen Miracle on the Hudson you will see Peter’s communication procedures used with the flight crew.
Captain DeNucci has consulted and created environments for change with his five-step leadership model and the Just and Safe...
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Kenneth Nemire, PhD, CPE
Forensic Human Factors Expert
HFE Consulting, LLC
Campbell, California
Human Factors, Warnings & Labels
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Products Liability, Slip Trip & Fall, Vehicle Accidents, Auto Accidents, Perception/Reaction Analysis, Driver Behavior, Distracted Driving, Motorcycle Accidents, Pedestrian/Bicycle Accidents, Night Vision and Lighting, Retail Safety, Workplace Safety
Expert in human factors and ergonomics with extensive experience testifying in motor vehicle accidents; product liability; and slip, trip, fall cases in state and federal courts. Retained by both plaintiff and defense attorneys. Specializes in forensic personal injury causation involving premises, product, vehicle, pedestrian, and workplace accidents. Human factors/ergonomics specialties include: Driver perception & behavior; Pedestrian perception & behavior; Perception response time; Night vision; Lighting, visibility & conspicuity; Slip, trip, misstep & fall (including falls from heights such as ladders & platforms); Product design & liability (including medical, consumer, industrial, agricultural); Human-machine interaction; Control/display layout; Warnings, signs & instructions. PhD in Experimental Psychology, Certified Professional Ergonomist, Certified XL Tribometrist, and OSHA authorized to teach 10 and 30 hr. courses in General Industry Safety. Designed and conducted human f...
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Captain Ross S Sagun, ATP
40+ years as an airline pilot and safety expert
Sagun Aviation Consulting LLC
Benicia, California
Aviation & Aerospace, Human Factors
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Airline Operations, Air Traffic Control, General Aviation, Training, FAR’s, Incident Investigation, Operations, Compliance, Pilot Error, Crew Performance, Pilot Fatigue, Crew Resource Management (CRM), Situational Awareness, Turbulence Injuries, Passenger Disruptions, Navigation and Communications
Highly experienced recently retired airline pilot and aviation safety representative with more than 50 years of flight experience and approximately 30,000 domestic and international flight hours in both major airline and general aviation aircraft
Former air traffic controller, international air safety representative involved in aviation rulemaking, flight instructor, general aviation aircraft owner and operator
FAA licensed pilot since 1972
Major-airline pilot 41 years, captain for 28 years, 19 years widebody captain
Areas of expertise include Federal Air Regulations (FAR) Part 121 airline and air traffic control operational safety issues, flight operations, standard operating procedures, regulatory and flight operations manual compliance, crew performance and coordination, cockpit-related human factors issues, crew resource management, turbulence injuries, procedural compliance, aircraft limitations, navigation and communications procedures, and best practices
Extensive experienc...
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Michael Dasargo
Use-of-Force Expert | Force Science Analyst
Stronghold Dynamic
San Diego, California
Firearms & Ballistics, Human Factors
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Advanced Force Science Analyst, Use-of-Force, Investigations, Performance Factors, Gun Safety, Counter-ambush Training, Decision-making, Perception and Cognition, tunnel vision, Firearms Training, startle-reaction, Officer Involved Shooting, Self Defense Shooting, Home Defense Shooting, Tactical Operations, Security
Use-of-Force (UOF) Expert Witness and Advanced Force-Science Analyst with
more than 20 years of international experience in executive protection, corporate
risk management, and tactical medicine. Leveraging advanced certifications in
defensive shooting, counter-ambush tactics, and force-science analysis, I provide
courts, law firms, and law-enforcement agencies with scientifically grounded
testimony, and actionable recommendations that withstand rigorous scrutiny.
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Michael Vredenburgh, M.S.
Human Factors, Biomechanics & Digital UX Expert
Vantage Forensics: Human Factors, Accident Reconstruction, & Biomechanics Inc.
California
Human Factors, Biomechanics
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Human Factors Engineering, User Experience, UX/UI, Perception-Reaction Time, PRT, Slips Trips and Falls, Drowsy Driving, PERCLOS, Looked But Failed To See, Satisfaction of Search, Warning Labels, Visual Conspicuity, Premises Liability, Software Platform Liability, Heavy Machinery, Elevator Accidents, Intersection Sight Distance, App
EXPERT OVERVIEW
Michael Vredenburgh, M.S., is the Founder and Principal Expert at Vantage Forensics. With over 15 years of forensic consulting and scientific research experience, he specializes in the intersection of Human Factors Engineering, Applied Biomechanics, and Human-Computer Interaction (HCI). Mr. Vredenburgh applies fundamental physics, computational simulations, and validated human-performance metrics to objectively evaluate human-system interactions and accident causation.
Retained as a primary expert in over 100 complex litigation matters, he maintains a rigorously objective, 50/50 balanced practice serving both plaintiff and defense counsel. He has been deposed and testified at trial 17 times since 2021 with zero Daubert exclusions, regularly qualifying in both state and federal courts.
PHYSICAL HUMAN FACTORS & APPLIED BIOMECHANICS
Mr. Vredenburgh analyzes the critical interaction between individuals, their environment, and physical forces. He utilizes state-of-the-a...
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MARTIN M BALABAN, PhD, PE
AR TECH
Encino, California
Accident Reconstruction, Safety
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Vehicle collisions, Premises liability, Safety, Code Compliance, Construction & Industrial Accidents, Failure Analysis, Human Factors, Biomechanics, Mechanical Engineering, OSHA, ADA compliance, Products Liability, Criminal, Licensed Safety Engineer in CA, Slip & Fall, Slip and Fall, Trip & Fall, Ladders, Trip and Fall
Vehicular:
all vehicle types, multi-vehicle, bicycles, pedestrians, skidmark analysis. damage-matching, occupant biomechanics. visibility & line-of-sight analysis, traffic signal phasing, vehicular component defects, seatbelts.
Premises Liability: Code Compliance, Slip, trip, floor friction testing, stairway & ramp accidents, glass injuries, guardrails; illumination issues; manual & electronic gates, ladders, door closing mechanisms, falling objects, structural failures. Occupancies include single- and multi-family residences, retail stores, office buildings, garages, sidewalks, parks and other public access.
Industrial & Construction accidents: Walking-working surfaces including ramps, hoisting & conveying, powered lifts, work platforms, forklifts, construction vehicles, materials handling & storage, machine guarding, ladders, scaffolding, trenching & shoring,
Cal-OSHA compliance, lockout/tagout, IIPP analysis, human factors & ergonomics issues.
Products Liability: Liabili...
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Omair Siddiqui, MSME
Expert in Vehicle Crashes & Black Box Analysis
Los Angeles, California
Accident Reconstruction, Automotive Engineering
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Accident Reconstruction, Event Data Recorder (EDR), Blackbox, Simulations, PC-Crash, Pedestrian collision, Collision Analysis, Forensic Engineering, Crash Investigations, Accident Analysis, Vehicle Dynamics, Crash Reconstruction, Accident Simulation, Human Factors, Crash Data Analysis
Additional Training
➢ SAE, Accident Recon, Autonomous Vehicle and ADAS, September 2021
➢ SAE, Brake Control Systems: ABS, TCS, and ECS, March 2021
➢ SAE, Driver Distractions, December 2020
➢ PC-Crash Training Course (Advanced), February 2020
➢ SAE, Photogrammetry and Analysis of Digital Media, June 2019
➢ California Motorcyclist Safety Program (CMSP), June 2019
➢ Human-Vehicle-Environment (HVE) Forum (EDSMAC/EDCRASH Training), February 2019
➢ SAE, Applied Vehicle Dynamics, December 2018
➢ SAE, Applying Automotive EDR Data to Traffic Crash Reconstruction, November 2018
➢ SAE, Side Impact Occupant Safety, November 2018
➢ SAE, Vehicle Crash Reconstruction: Principles and Technology, August 2018
➢ Southwestern Association of Technical Accident Investigators (SATAI) Conference, July 2018
➢ Tesla EDR Training, June 2018
➢ Collision Safety Institute – Crash Data Retrieval (CDR) Technician Course, June 2018
➢ I-CAR Collision Repair Course, May-June 2018
➢ Digital Photography- California Cen...
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Gavin Huntley-Fenner, Ph.D.
Human Factors and Cognitive Sciences Expert
Rimkus
Irvine, California
Human Factors, Safety
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Risk Analysis, Risk Perception, Hazard Communications, Safety and Human Development, Human Perception-Response Time, Decision Making, Cognitive Psychology, Consumer Electronics, Pharmaceuticals, Professional Products, Medical Devices, Human Behavior, Literature Reviews, Incident Database Reviews, Surveys and Human Subject Test
Dr. Gavin Huntley-Fenner is a nationally recognized expert in human factors and safety whose problem-solving skills and communication style have made him widely sought after as a consultant. Along with providing comprehensive risk analyses for a wide variety of product types, Dr. Huntley-Fenner often serves as an expert witness for matters relating to risk perception, hazard communications, safety and human development, human perception-response time, and decision-making.
With a background of over 25 years as a researcher, author, educator, and business consultant, Dr. Huntley-Fenner applies the latest findings and research methods in cognitive psychology and related disciplines to real-world, often life-and-death, situations. Dr. Huntley-Fenner’s recent consulting and forensic projects have involved diverse products such as consumer electronics, pharmaceuticals, professional products, and medical devices. He has conducted investigations into human behavior in home, school, workpl...
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Jason C Fries
3D Forensic, Inc.
Concord, California
Accident Reconstruction, Human Factors
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Nighttime Visibility, Line-of-Sight Analysis, Driver's Perspective Animation, 3D Video Reconstruction, Use-of-Force Reconstruction, Officer-Involved Shooting Reconstruction, Use-of-Force Human Factors, Ballistic Trajectory Analysis, Photogrammetry, Laser Scanning, Forensic Animation
Jason C. Fries is the CEO and lead forensic expert of 3D Forensic, Inc. He has worked on forensic analyses and productions since 1997 and has since become one of the most reputable forensic voices in the industry. Fries’s innovations in multiple forensic specialties have enabled 3D Forensic to offer some of the most comprehensive services in the nation.
Fries developed his forensic prowess through research in use-of-force incidents at the Force Science Institute, completing the Advanced Specialist certification. He also graduated from San Diego State University with a BS in Biology and focuses in Physics and Chemistry.
Throughout his years as CEO of 3D Forensic, Jason has successfully infused forensic testimony, visualization, and analysis to the company’s casework, earning the trust and recognition of California and the nation’s most influential attorneys. He has written numerous pieces for forensic and legal publications including Forensic Magazine, Claims Magazine, Internationa...
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Jamie Klopp
Transportation Design: Automotive and Aircraft
Klopp US LLC
Encinitas, California
Automotive, Aviation & Aerospace
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Automotive Design, Car Design, Aircraft Design, Product Design, Human Factors, Ergonomics, Styling, Interface, Intellectual Property, Patent, Manufacturing, Engineering, FAA, FMVSS, Interior, Exterior, Seats, Utility Patent, Design Patent, Design Process
Jamie Klopp owns and operates Klopp US LLC, an Automotive, Aircraft, and Product Design Expert Witness service. In addition to expert work, Mr. Klopp is an active design professional working in automotive and aerospace product development. Mr. Klopp holds broad design expertise with specific focus on Passenger Automotive Vehicles and Part 23 Fixed-Wing Aircraft and Part 27 Rotorcraft.
Jamie Klopp provides litigation graphics services that complement his expert witness work in automotive, aircraft, and product design. He creates 3D animations and renderings for intellectual property cases, including technology tutorials and patent disputes, as well as manufacturing processes, industrial systems, and technical subjects. His work includes visualizations of product defects, engineering failures, design processes, and human factors issues. He also produces 2D trial graphics such as diagrams illustrating design elements, patent claims, manufacturing sequences, and engineering specificati...
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Mohammad Atarod, PhD, PE
Testifying Expert-Accident Recon and Biomechanics
Atarod Biomechanics Laboratories
LAGUNA NIGUEL, California
Biomechanics, Accident Reconstruction
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Accident Reconstruction, Biomechanical Analysis of Injury, Premises Liability, Slips/Trips and Falls, Crash Data Retrieval, Heavy Vehicle EDRs, Blackbox Download, Photogrammetry, Computer Simulations, Failure Analysis, Human Factors, Laboratory Testing, 3D Laser Scanning, Expert Witness Testimony
I am a Senior Biomechanical Engineer and Accident Reconstructionist. I am registered as a professional mechanical engineer (PE) in California, Nevada and Colorado. I specialize in accident reconstruction, injury biomechanics and injury mechanism/causation analysis. I works on cases across the country, analyzing injuries in automotive collisions, industrial accidents, workers compensation claims, premises liability claims, slip/trip and falls, and sport/recreation accidents. I have provided litigation support to insurance companies, law firms, and automotive manufacturers/industries over the past 12+ years.
Technical Areas of Specialization:
- Biomechanical Analysis of Injury
- Accident Reconstruction
- Premises Liability; Slips/Trips and Falls
- Crash Data Retrieval; Heavy Vehicle EDRs
- Photogrammetry and 3D Computer Simulations
- Vehicle Systems Analysis
Services:
- Accident Reconstruction
- Biomechanical Analysis of Injury
- Premises Liability; Slips/Trips and Falls
- Crash Dat...
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Matthew J Hartley, BS, LC, MIES
Nationally Recognized Lighting Expert
Matt Hartley Lighting, LLC
Arvada, Colorado
Engineering, Architecture
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Lighting, Illumination, Interior Lighting, Street and Area Lighting, Lighting Survey, Fixture Construction, Lighting Installations, Premises Liability Lighting, Security Lighting, Insufficient Lighting, Accident Investigation Lighting, Human Factors, Slip & Fall, OSHA, Glare, Visibility, Walking and Working Surfaces, Control Systems
Illumination Engineer, consultant, teacher, inventor, forensics investigator, and expert in lighting. My 30+ years of experience has immersed me in different facets of the lighting industry. I have worked for companies that cater to lighting design, lighting equipment manufacturing, 3d modeling lighting software, sales and service including post occupancy evaluation. My design experience includes indoor/outdoor lighting, safety and security, lighting and human health, glare, roadway lighting, sports lighting, and lighting standards. Since 1999, I have been involved with standard writing committees within the Illuminating Engineering Society (IES). For the IES, I served on 13 IES committees, of which was the chair of 7 of those committees producing over 11 standards documents.
Teaching has also been a part of my career, instructing diverse groups from high school students to seasoned lighting professionals allowing these individuals to understand the concepts on their level. ...
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Kristopher J. Seluga, M.S., PE
Technology Associates, LLC
Stratford, Connecticut
Accident Reconstruction, Products Liability
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Mechanical Engineering, Biomechanics, Automotive, Construction, Engineering, Failure Analysis, Forensic Science, Golf Carts, Human Factors, Motorcycle, Premises Liability, Safety, Slip Trip & Fall
Our staff of experienced engineers are ready to apply established scientific and engineering knowledge and techniques to your case. Our staff has published hundreds of papers, served on national ANSI standards committees and assisted over 2,800 attorneys and insurance agents settle or try their cases.
Because the laws of physics and principles of engineering are universal, we are able to investigate and opine on a wide range of topics including motor vehicle crashes, heavy machinery, consumer products, construction sites, falls and biomechanical analyses. In each case, we assist our clients by determining, in as much detail as possible, how and why an accident occurred and communicating those finding in a clear and concise manner.
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Michael W. Boyce, PhD
Human Factors, Usability & Accessibility Expert
Boyce Human Performance, LLC
Shelton, Connecticut
Human Factors, Ergonomics
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usability, accessibility, ADA, assistive technology, wheelchairs, mobility devices, augmented reality, virtual reality, simulation training, human-computer interaction, medical devices, patient safety, electronic health records, instructions, evacuation, human performance, cognitive workload, disability, aging in place
Michael Boyce, PhD, is a human factors expert specializing in usability, accessibility, and assistive technology. He is Principal of Boyce Human Performance, LLC, and has spent 12+ years applying human factors methods in healthcare and defense settings.
His expertise covers usability evaluation (formative and summative) of medical and consumer systems; task analysis and use-related risk analysis; accessibility, ADA, and Section 508; assistive technology and mobility devices, including wheelchairs; design of instructions for emergency evacuation of adults with disabilities (published in Applied Ergonomics); augmented and virtual reality; simulation-based training; and human performance measurement, including wearable physiological data (heart rate variability, electrodermal activity).
Dr. Boyce led human factors research programs for the U.S. Army on simulation-based training, human-machine interaction, and augmented reality (Best S&T Program award, 2021). His healthcare work inclu...
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Joseph Manges
Accident Reconstruction
Capture My Crash, LLC
Tampa, Florida
Accident Reconstruction, Trucking
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Accident Investigation, Rapid Response, Commercial Vehicle Collisions, Crash Data Retrieval, EDR Downloads, Human Factors, Motorcycle, Pedestrian, Bicyclist, Electric scooters, Simulations, Animations, Infotainment Downloads, ECM Downloads, Nighttime Visibility, Drone pilot, Damage Consistency Evals
Joe is an accident reconstructionist delivering meticulous and comprehensive collision analysis and reconstruction services catering to both passenger and commercial vehicles. Employing state-of-the-art data acquisition systems and advanced analysis tools, I adeptly collect and decipher pivotal data sourced from the scene, EDR black boxes, and other relevant sources. This data enables me to reconstruct the events leading up to the collision with a high level of accuracy and provide a scientifically supported analysis to assist with determining liability and contributory factors. I have investigated and reconstructed hundreds of crashes involving cars, trucks, pedestrians, bicyclists, electric scooters, motorcycles, etc. over the past 20+ years. Defense and Plaintiff cases accepted.
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John D Lloyd, PhD, CPE, ACTAR
Biomechanics, Human factors & Crash reconstruction
San Antonio, Florida
Motorcycle, Biomechanics
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human factors, biomechanic, accident reconstruction, motorcycle accident, motorcycle crash, motorcycle riding, motorcycle handling, motorcycle inspection, motorcycle testing, bicycle, e-bike, scooter, car crash, auto accident, ATV / UTV, brain injury, TBI, helmet, helmet testing, motorcycle helmet
John Lloyd, PhD, CPE, ACTAR is triple board-certified and a distinguished authority in motorcycle accident reconstruction, injury biomechanics and human factors, with 30+ years of testifying experience. As a motorcyclist with over 40 years of riding experience and advanced training, his in-depth understanding of the dynamics involved in motorcycle crashes distinguishes him as a true specialist in the field.
Dr. Lloyd has been qualified to provide biomechanical analyses of various incidents, including:
. Motorcycle Accident Reconstruction
- Motorcycle riding
. Injury Biomechanics
. Human Factors
. Motorcycle handling and operation
. Motorcycle inspection and testing
. Motorcycle helmets
. Biomechanics of Head and Brain Injury
. Football and sports helmets
. Automobile accidents
. Truck accidents
Dr. Lloyd earned a Ph.D. in Ergonomics (Human Factors Engineering) with a specialization in biomechanics from Loughborough University in England. He has been board certified through the Bo...
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Helena K Breuer
Transportation Safety Expert
Forensic Human Factors
Jacksonville Beach, FL, Florida
Traffic Engineering, Transportation
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Human factors, Maintence of Traffic, Traffic Control Devices
Accident Reconstructionist in Training (320+ hours) - courses include: At-Scene Traffic Crash/Traffic Homicide Investigation, Advanced Traffic Crash Investigation, Traffic Crash Reconstruction, Crash Data Retrieval (CDR) Data Tool Analyst, Motorcycle Crashes - Level II, Commercial Motor Vehicle Crash Investigation - Level I (IP).
Ph.D. in Civil Engineering, Transportation Engineering, where I was an Advancing Sciences in America (ARCS) Scholar and Dwight D. Eisenhower Transportation Fellow (FHWA). During my Ph.D., I worked in a full-scale driving simulator and studied driver behavior (visual attention, stress levels, speed) around their interactions with bicyclists at intersections, user perceptions of bike turnouts, and human interactions with fully autonomous vehicles. I have conducted research for the NCHRP, NHTSA, and Oregon DOT. Subsequently, I have extensive experience with technical correspondence and creating and delivering presentations to panels and technical advisory com...
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Kevin M Alvarez
Chief Pilot · Aviation Expert Witness
AeroVerdict Consulting
New Port Richey, Florida
Aviation & Aerospace, Transportation
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Aviation accident, Expert witness, Aviation safety, Corporate aviation, Safety management, Aircraft accident, Flight operations, FAA compliance, Business aviation, Operational analysis, Accident investigation, Pilot error, Aviation risk, Pilot decision making, Part 91 operations, Human factors, Aircraft operations, CRM, Part 135
Kevin M. Alvarez is a corporate aviation Chief Pilot and aviation operations expert specializing in aircraft accident investigation, aviation operational analysis, and business jet flight operations. With more than 5,000 hours operating advanced business aircraft and over a decade leading corporate flight departments, he provides expert analysis regarding aviation accidents, pilot decision-making, FAA regulatory compliance, and aviation safety management.
Mr. Alvarez currently serves as Chief Pilot for a Part 91 corporate aviation operation, flying advanced business jets throughout North America, Europe, Canada, Mexico, and the Caribbean. His operational experience includes international flight planning, complex aviation risk management, and the implementation of safety management practices in corporate aviation environments. His analytical methodology is structured to satisfy Daubert reliability requirements, with full methodology documentation and sample report excerpts available...
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Bradley T Cook, PE, MSE, CXLT
Kimley-Horn
Sarasota, Florida
Accident Reconstruction, Biomedical Engineering
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Auto Accident, Accident Reconstruction, Biomedical, Biomechanical, Collision Analysis, Crash Data Retrieval, Human Factors, Motorcycle, Occupational Safety, Premises Liability, Product Liability, Slip Trip & Fall
Bradley is a Biomedical and Mechanical engineer with extensive experience in accident reconstruction. Bradley is a licensed professional engineer (PE) in Michigan and Florida. He specializes in vehicular accident reconstruction and has investigated hundreds of vehicle accidents involving cars, trucks, pedestrians, bicyclists, motorcycles, etc. The investigations have involved issues of nighttime visibility, downloading of crash data (black box data), reaction time, and blind spots. He holds a Bachelor of Science in Mechanical Engineering from the University of Michigan and a Masters of Science in Engineering with a concentration in Biomedical from Purdue University.
Bradley has co-authored a chapter in Forensic Human Factors and Ergonomics: Case Studies and Analysis and Occupational Health and Safety Management in the Handbook of Human Factors & Ergonomics. He is also currently a committee member of the Underwriters Laboratories (UL) Standards Technical Panel (STP) 2201: Engi...
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Keith M. Cianfrani, Ed.D, (abd), MAS, CISM
Aviation Accident Investigator
Aviation Safety Consultants, LLC
The Villages, Florida
Aviation & Aerospace, Accident Reconstruction
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Aviation Accident Investigation, Risk Management, Human Factors, Safety Management Systems (SMS), Aviation Safety Auditing, Flight Data Monitoring
Keith M Cianfrani, Ed.D. (abd), MAS, CISM, President/CEO, Aviation Safety Consultants, LLC is a company designed to assist the aviation community with precise and specific safety consulting. Our clients include insurance companies, Part 135 and Part 91 aviation operators, aviation flight schools, aircraft production companies, and law firms.
Keith is a retired U.S. Army Lieutenant Colonel, the founder and owner, has over 40 years of aviation experience. He is a master army aviator, aviation safety officer, commercial pilot, instructor pilot and was an accident investigator for the U.S. Army Safety Center. He is rated in both rotary wing and fixed wing aircraft. As a safety officer, Keith has managed safety programs in organizations with over 100 aircraft stationed throughout 5 states. Keith is is an a safety and accident investigation instructor for Embry Riddle Aeronautical University.
Keith is a certified Flight Instructor (CFI) and has also worked in the civilian, commercial a...
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Lloyd A Marks, MD, MBS, FACC, FAIMBE
Medical Device Inventions, IP & Commercialization
Medical Invention Consulting, LLC
Tampa, Florida
Medical Devices, Intellectual Property
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Medical Devices, Medical Technology, Patents, Intellectual Property, Inventions, Entrepreneurship, Due Diligence, Medical Device Assessment, Medical Device Protection, Medical Device Commercialization, Human Factors, Medical Twechnology Assessment, Medical Technology Protection, Medical Technology Commercialization
I’m an electrical engineer (MIT), physician (University of Michigan), pediatric cardiologist (Johns Hopkins), MBA (UTK), inventor with 20 medical device and 5 sporting equipment patents, and entrepreneur with three startup companies, one of which, MGI Medical, LLC (www.mgimedical.com), is commercializing an invention of mine, the Pulse Flowmeter, which can detect hemodynamically significant occult blood loss well before the blood pressure drops. This is for the management of trauma, post-operative bleeding, battlefield triage, GI bleeders and battlefield injuries).
I am a fellow of the American College of Cardiology and the American Institute of Medical and Biological Engineering. Honors include membership in Tau Beta Pi (Engineering Honorary) , membership in Eta Kappa Nu (electrical engineering honorary), a listing in Marquis Who's Who in America and Physician Leader of the year at the Physician's Executive MBA Program at the University of Tennessee, Knoxville.
Because of my ba...
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Daniel J. Hartwig, CSP, CIH
Safety, Human Factors, Industrial Hygiene
General Health & Safety Services LLC
Punta Gorda, Florida
Safety, Premises Liability
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Slip & Fall, Personal Injury, Speed Bumps, Stairs, Chemical Exposure, Noise, Product Liability, Machine Safety, Human Factors, Indoor Air Quality, Industrial Hygiene, Mold, Warnings, Construction, Trip & Fall, Best Practice
Daniel Hartwig, CSP, CIH is President of General Health & Safety Services LLC. and has provided safety counsel and expert witness testimony throughout the United States for since 1978 from offices in Wisconsin and Florida. Because of the wide variety of clients served, he has experience in many environments including retail stores, hotels, homes, restaurants, manufacturing facilities, construction sites, hospitals and nursing homes, auto dealerships and many more.
Being a premises safety expert, Mr. Hartwig performs investigations related to construction, operation, and maintenance of commercial premises, residential structures, and industrial facilities. The investigations involve site inspections and review of applicable standards. Based on the above information and review of the discovery material, he performs a root cause analysis of the accident, enabling him to provide a strong basis for his opinions.
For product liability cases, he provides analysis of possible defects, wa...
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David M. Diamond, Ph.D.
Expert on Stress, Decision-Making and Memory
University of South Florida
Tampa, Florida
Human Factors, Behavioral and Social Sciences
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brain, memory, stress, post-traumatic stress disorder, PTSD, memory failure, forgotten baby syndrome, amnesia, trauma, heatstroke, automobile-related fatality, cognition, traumatic brain injury, negligence, decision-making
I am a professor in the Department of Psychology, Cognitive, Neural and Social Division, at the University of South Florida. I have been studying the brain and memory for over 40 years, and I have served as an expert witness on memory-related cases for the past 16 years. In one area of expertise, I have studied how parents and caretakers, without evidence of abuse or neglect of children, unintentionally and unknowingly, forget children in cars. Under conditions in which the ambient temperature is warm enough and the car is exposed to direct sunlight, heat builds within the car and the child may die or become brain damaged as a result of heatstroke. I have testified as a memory expert in cases in which these parents and caretakers have been charged with civil and criminal crimes, including manslaughter. In a related area of expertise, I recently retired as a career scientist in the Department of Veterans Affairs, with 30 years of research on post-traumatic stress disorder (PTSD). I ...
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Michael Vredenburgh, M.S.
Human Factors, Biomechanics & Digital UX Expert
Vantage Forensics: Human Factors, Accident Reconstruction, & Biomechanics Inc.
Tampa, Florida
Human Factors, Biomechanics
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Human Factors Engineering, User Experience, UX/UI, Perception-Reaction Time, PRT, Slips Trips and Falls, Drowsy Driving, PERCLOS, Looked But Failed To See, Satisfaction of Search, Warning Labels, Visual Conspicuity, Premises Liability, Software Platform Liability, Heavy Machinery, Elevator Accidents, Intersection Sight Distance, App
EXPERT OVERVIEW
Michael Vredenburgh, M.S., is the Founder and Principal Expert at Vantage Forensics. With over 15 years of forensic consulting and scientific research experience, he specializes in the intersection of Human Factors Engineering, Applied Biomechanics, and Human-Computer Interaction (HCI). Mr. Vredenburgh applies fundamental physics, computational simulations, and validated human-performance metrics to objectively evaluate human-system interactions and accident causation.
Retained as a primary expert in over 100 complex litigation matters, he maintains a rigorously objective, 50/50 balanced practice serving both plaintiff and defense counsel. He has been deposed and testified at trial 17 times since 2021 with zero Daubert exclusions, regularly qualifying in both state and federal courts.
PHYSICAL HUMAN FACTORS & APPLIED BIOMECHANICS
Mr. Vredenburgh analyzes the critical interaction between individuals, their environment, and physical forces. He utilizes state-of-the-a...
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Diego M Garcia, MD, Ms, aFAsMA
Awarded Aerospace Medicine & Human Factors Expert
SmartFlight
Ormond Beach, Florida
Aviation & Aerospace, Human Factors
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Aviation, Pilots, Flight Crew, Cabin Crew, FAA Aeromedical Certification, HIMS, Accident Investigation, Survivability, Injury Causation, Human Factors & Aerospace Safety, HSEQ, Airlines, Patient Safety, Medical Error, NTSB, Aerospace Medicine, Flight Surgeon, Occupational Medicine, Medical Device Usability, Medical Technolog
Award-winning physician-scientist, aerospace medicine specialist, and human factors expert with over 15 years of experience supporting safety, human performance, and operational resilience in aviation, aerospace, healthcare, and other high-consequence environments. Extensive expertise in accident investigation, human performance analysis, survivability, safety systems, operational risk management, and human-systems integration.
Recipient of the 2024 Aerospace Medical Association John Paul Stapp Award, recognizing contributions to aerospace medicine and human performance research related to accident investigation and injuries caused by vibration, impact, and ejection forces.
Professional experience includes multidisciplinary aviation accident and incident investigations involving human factors, aeromedical causation, survivability, organizational safety, and operational performance. Contributed to over 30 aviation accident and incident investigations, including major accidents, whi...
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Mohammad Atarod, PhD, PE
Testifying Expert-Accident Recon and Biomechanics
Atarod Biomechanics Laboratories
Hawaii
Biomechanics, Accident Reconstruction
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Accident Reconstruction, Biomechanical Analysis of Injury, Premises Liability, Slips/Trips and Falls, Crash Data Retrieval, Heavy Vehicle EDRs, Blackbox Download, Photogrammetry, Computer Simulations, Failure Analysis, Human Factors, Laboratory Testing, 3D Laser Scanning, Expert Witness Testimony
I am a Senior Biomechanical Engineer and Accident Reconstructionist. I am registered as a professional mechanical engineer (PE) in California, Nevada and Colorado. I specialize in accident reconstruction, injury biomechanics and injury mechanism/causation analysis. I works on cases across the country, analyzing injuries in automotive collisions, industrial accidents, workers compensation claims, premises liability claims, slip/trip and falls, and sport/recreation accidents. I have provided litigation support to insurance companies, law firms, and automotive manufacturers/industries over the past 12+ years.
Technical Areas of Specialization:
- Biomechanical Analysis of Injury
- Accident Reconstruction
- Premises Liability; Slips/Trips and Falls
- Crash Data Retrieval; Heavy Vehicle EDRs
- Photogrammetry and 3D Computer Simulations
- Vehicle Systems Analysis
Services:
- Accident Reconstruction
- Biomechanical Analysis of Injury
- Premises Liability; Slips/Trips and Falls
- Crash Dat...
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Lee T Ostrom, Ph.D., CSP, CPE, CTM
Human Factors, Ergonomics, and Safety Expert
Sole Proprietor
Idaho Falls, Idaho
Safety, Ergonomics
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Human Factors, Risk Assessment, Product Safety, Slips/Falls, Complex environments, Workplace Design, Procedures, Maintenance, inspection
CV Lists my current cases. Below are a sample.
2025-Present-Valerie Walker on behalf of her deceased son Anthony v the City of New Orleans, Partners, LLC and L&R Security Services, Inc. This case involves access to the abandoned Market Street Power Plant by a group of urban explorers and the death of Anthony.
CORE vs PSCo - May 2022 till November 2023 - Breached Contract and Negligence. I provided human factors/industrial safety support to plaintiff’s counsel. The jury said when interviewed that the human factors testimony I provided helped to persuade their decision. A synopsis of the lawsuit is below:
On Oct. 25, a Denver district court jury found in favor of CORE in its lawsuit against Public Service Company of Colorado, a subsidiary of Xcel Energy Inc. (Xcel), regarding the mismanagement of the Comanche Unit 3 coal-fired power plant. CORE was awarded $26.45 million for lengthy outages on 2020 and 2022 caused by Xcel’s imprudent operations and negligence.
2022-Employee in...
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Adam K Aleksander, PhD, PE, CSP
Aleksander & Associates P.A.
Boise, Idaho
Human Factors, Products Liability
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Mechanical, Industrial, Safety Engineering, Forensic Engineering, Human Factors, Product Liability, Warnings, Labels, Defects, Visibility, Reconstruction, Failure Analysis, OSHA, Construction, Equipment Failures, Industrial Accidents, Power Utility Accidents, Insurance Claims, Photogrammetry
Dr. Aleksander has a diversified Engineering background with specific experience (50 years) in Manufacturing, Cost Analysis, Consulting Engineering, Engineering Sales, Project Management, Product Development, Research, Lecturing, and Technical / Litigation Forensic Engineering Investigations of accidents and equipment failures. He has worked extensively in heavy industry (conveyors, biomass boilers, electric utilities) as well as the Forensic Engineering practice. Dr. Aleksander was the founding chair of the ASTM committee E58 on Forensic Engineering. He worked overseas on some 40 occasions in multiple South East Asia locations, and was involved in innovative efforts in international plastics mitigation. His academic credentials (Ph.D. Human Factors and Safety Engineering) bring a solid foundation to issues regarding product liability, warnings, labels, and use, based on a decades of development and research, and standards. This training also compliments Dr. Aleksander's experience...
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David G Curry, PhD, CHFP, CSP
Curry Human Factors & Safety LLC
Oswego, Illinois
Human Factors, Safety
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Human Capabilities & Limitations, Human-Machine Interface, Ergonomics, Driver Behavior & Capabilities, Warnings & Instructions, Perception, Vision & Visibility, Accident Investigation, Machine Design, Slips, Trips & Falls, Operator-Vehicle Interaction, Surface Transportation
Dr. Dave Curry is the Principal Consultant for Curry Human Factors & Safety LLC. He consults on all aspects of human factors, applied human performance, ergonomics, and safety. Areas of particular expertise include: human-machine interface design and evaluation, human capabilities and limitations in applied environments, industrial ergonomics, instructions and warnings, perception/vision/visibility, slips/trips/falls, the evaluation of equipment/facilities/structures from a human use standpoint, and safety-related issues in general. He is recognized as an expert in operator-vehicle interaction and is both a Certified Human Factors Professional and a Certified Safety Professional.
He is the author of over sixty technical papers dealing with various issues relating to applied human performance, safety, and accident investigation. He holds several U.S. patents and design awards and has or does serve as a member of national standards-making committees for a variety of organizations (...
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Elliott B Lushin
USMC F/A-18 & A-10 Pilot – Aviation Safety Expert
Lushin Aviation Safety & Consulting LLC
Columbus, Indiana
Aviation & Aerospace, Human Factors
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Pilot Error, Flight Training & Instruction, International Airline Operations, Human Factors, Crew Resource Management (CRM), Aeronautical Decision Making, Safety Management Systems (SMS), Aviation Safety, Military Aviation Operations, Airline Operations, Aviation Maintenance & Safety Programs
Elliott Lushin is a highly experienced aviation professional offering expert witness and consulting services in pilot performance, human factors, aeronautical decision-making, crew resource management, airline operations, flight training standards, and aviation safety program effectiveness.
He brings a rare combination of high-performance military fighter pilot experience, hands-on aviation maintenance and safety program leadership, and major airline domestic narrowbody international widebody operations. In addition, Elliott has significant experience leading organizational excellence and leadership development programs for companies of all sizes, giving him unique insight into how leadership decisions, organizational culture, and systemic blind spots impact safety and operational performance. Attorneys value his ability to provide clear, credible analysis grounded in real-world operational and safety leadership experience.
CIVIL
ATP: MEL (A-350, A-320 family, B-757/767, DC-9/MD-88,...
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John R Bell II, ATP, CFI -A, I and Multi Engine
Aviation Expert Witness
JB Aviation LLC
Wichita, Kansas
Aviation & Aerospace, Human Factors
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Cessna Citation, Textron Aviation, General Aviation Expert Witness, FAA Violations, Aviation Accident Investigation, Aircraft Acceptance, Aircraft Prebuy, Airplane Accident Investigation, Crew Resource Management (CRM), Pilot Fatigue, Pilot Training, Air Traffic Control (ATC), FAA Investigations, NTSB, Navigation, Pilot Error
JB Aviation, LLC was founded in 1998. My background experience includes 45+ years in General and Corporate Aviation, logging over 17,000 plus accident free flight hours. Recipient of the FAA Wright Brothers Master Pilot Award (50 years). Hold an ATP (Airline Transport Pilot) certificate along with an CFI Gold Seal (Certified Flight Instructor – Airplane-Instrument & Multi-engine). Background also includes Air Taxi Operations – FAR Part 135, Flight Training FAR Part 141 Flight Schools and FAR Part 142 Training Centers. Also include services – Aviation Department Development, Short-Term Aircraft Management, Aircraft Evaluations and Deliveries, Aircraft Systems and Crew Training, Ferry Flight Services and SOE/IOE training requirements.
Since 1998, we’ve specialized in professionally guiding and accommodating domestic and international Cessna Citation owners and operators. With over 45+ years of experience in worldwide corporate aviation including destinations with several North Atlant...
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Fred W. Turek, Ph.D.
Circadian & Fatigue Expert - Northwestern Univ.
Circadian
Stoneham, Massachusetts
Transportation, Human Factors
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Driver Fatigue, Fatigue Impairment, Human Fatigue, Accident Investigation, Human Factors, Operator Fatigue, Driver Alertness, Circadian Rhythms, Sleep Deprivation, Drowsy Driving, Fatigue Risk Management, Chronobiology, Truck Accidents, Motor Vehicle Accidents, Rail Accidents, Marine Accidents
Dr. Fred W. Turek is an internationally recognized authority on sleep, circadian rhythms, fatigue, shift work, and human performance. He is the Charles E. and Emma H. Morrison Professor of Biology at Northwestern University and Founder and Director of Northwestern University's Center for Sleep and Circadian Biology, one of the world's leading research centers in the field.
For more than 40 years, Dr. Turek has conducted pioneering research on the biological mechanisms that regulate sleep, alertness, fatigue, cognition, performance, and health. He is widely recognized for his role in the discovery of the first mammalian CLOCK gene, a landmark breakthrough that transformed modern circadian biology. He is also a co-inventor on multiple U.S. patents related to sleep and circadian regulation.
Dr. Turek founded and served as the first President of the Society for Research on Biological Rhythms and has held leadership positions with the Sleep Research Society and numerous scientific jour...
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Martin Moore-Ede, M.D., Ph.D.
Sleep, Fatigue & Human Performance Expert
Circadian Expert Services
Stoneham, Massachusetts
Transportation, Human Factors
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Driver Fatigue, Fatigue Impairment, Human Fatigue, Accident Invesitgation, Human Factors, Operator Fatigue, Driver Alertness, Circadian Rhythms, Sleep Deprivation, Drowsy Driving, Fatigue Risk Management, Chronobiology, Truck Accidents, Motor Vehicle Accidents, Rail Accidents, Marine Accidents, Circadian Rhythms, Shift Work
Dr. Martin Moore-Ede is an internationally recognized authority on sleep, fatigue, circadian rhythms, human performance, occupational safety, and fatigue risk management. He is the Founder and Chairman of Circadian® and Circadian Expert Services and has spent more than four decades helping organizations understand and mitigate the effects of sleep loss, fatigue, and circadian disruption on safety, health, and operational performance.
A physician and physiologist, Dr. Moore-Ede earned his medical degree from the University of London and his Ph.D. in Physiology from Harvard University, where he later served on the faculty of Harvard Medical School as Associate Professor of Physiology. He is widely recognized for pioneering research into the biological clock and the impact of fatigue and sleep disruption on human behavior, cognition, decision-making, and safety.
Dr. Moore-Ede has directed more than 100 research studies and over 300 consulting projects involving sleep, fatigue, shift ...
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James M. Miller, PE, PhD
Engineering Safety, Agricultural, Batteries, Nano
J.M. Miller Engineering, Inc.
Ann Arbor, Michigan
Safety, Agriculture Engineering
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Accidents, Auto ADAS, Agriculture, Battery Fires, Cannabis Processing, Chemical Exposure, Child Safety, Construction, Electrocution, Ergonomics, Fitness Equipment, Fires/Explosions, HazCom, Human Factors, HVAC, Mechatronics/Nano, Medical Devices, OSHA, Recalls, RV/ATV
There are four PhD and registered Professional Engineers at Miller Engineering who are celebrating 40 years of Professorships at three universities along with providing services to Government, Insurance, and Industry—through research, publications, presentations, and expert testimony. These co-founders and associates are James M. Miller, PE, PhD; Mark R. Lehto, PhD; David R. Clark, PE, PhD; Adam M. Olshove, PE, MSE; and Jeffrey D. Rupp, MSE. Miller Engineering has a dedicated office with a full-time staff of engineers, researchers, and technical writers. The span of our collective academic and experiential expertise includes the Mechanical, Electrical, Chemical, Agricultural, Industrial, Human Factors, Ergonomic and Safety fields of engineering. Miller Engineering’s principle engineers wrote the original books on warnings and instructions, have published in several other areas, have participated in product designs and patents, and have analyzed, reconstructed and/or animated numerou...
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Steven M. Hall, MSE, CPSM
National Standards Committee for Warnings Chairman
Rimkus
Ann Arbor, Michigan
Human Factors, Warnings & Labels
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Instructions, ANSI Z535, Safety Symbols, Human Error, Occupational Safety, Consumer Products, Children's Products, Chemical Hazard Communication, Motor Vehicles, Off-road and Recreational Vehicles, Boats Watercraft Watersports, Construction Equipment, Outdoor Power Equipment, Farm Machinery, Industrial Machinery, Firearms
Mr. Steven Hall holds a B.S.E. in Engineering Physics and an M.S.E. in Industrial and Operations Engineering from the University of Michigan. He has expertise in the fields of warnings and instructions design, ergonomics, human factors engineering, and product and occupational safety.
Mr. Hall serves as Chairperson of the American National Standards Institute (ANSI) Z535 Committee on Safety Signs and Colors. This committee establishes national consensus standards for, among other things, product safety labels and safety information in product manuals. He previously served as Chairperson of the ANSI Z535.4 Subcommittee on Product Safety Signs and Labels. He is a member and former Vice-Chairperson of the ANSI Z535.6 Subcommittee on Product Safety Information in Product Manuals, Instructions, and Other Collateral Materials. He is also a member of the ANSI Z535.5 Subcommittee on Safety Tags and Barricade Tapes (for Temporary Hazards) and the Z535.2 Subcommittee on Environmental and ...
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Jared Frantz, M.S.E., CHFP
Certified Human Factors Expert
Rimkus
Ann Arbor, Michigan
Human Factors, Premises Liability
Mr. Jared Frantz is a Certified Human Factors Professional who specializes in human factors/ergonomics, warnings, and product, occupational, and premises safety. He holds a B.S.E. and M.S.E. from the University of Michigan in Industrial and Operations Engineering and continuing product safety training through St. Louis University.
Mr. Frantz teaches a safety management course in the College of Engineering at the University of Michigan. His research and teaching include product and occupational safety, risk assessment and communication, human factors in accident causation, and assessment of walking surfaces.
Mr. Frantz has extensive experience developing and evaluating warnings and safety symbols for a wide variety of consumer and commercial products. He has been involved in the development of national standards for product warnings and is a member of the American National Standards Institute (ANSI) Z535.4 Subcommittee on Product Safety Signs and Labels and Z535.7 Subcommittee on P...
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Jon (Mike) M Kramer, MD, MBA
Sr. Physician Leader in Safety and Health Records
Health Value Leadership, LLC
Montague, Michigan
Safety, Information Technology
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quality, safety, informatics, Epic, EMR, EHR, physician, culture, high reliability, administration, Electronic records, records, human factors, decision support, laboratory, inbasket
Dr. Kramer has previously held roles including Chief Medical Information Officer and Chief Quality and Safety Officer. Dr. Kramer practiced Internal Medicine and Pediatrics while developing his senior administrative leadership career.
Dr. Kramer's leadership includes 25+ years of experience in implementing and maintaining electronic health records, developing systemwide workflows, standards of practice, and outcomes measurement. Expertise includes quality, safety, human factors, and workflow design that result in quality and safety outcomes. At these organizations, Dr. Kramer led the informatics teams and regularly evaluated patient safety, adverse events, and implemented systems and processes to reduce risk. This included policies, training, cultural change, and communications.
Formerly CMIO for major health systems including University of Michigan, Trinity Health, Corewell West (Spectrum Health), OhioHealth and Inova Health. Senior most leader in those organizations resp...
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Raina J. Shah, M.S.E., C.P.S.M., CPE
Human Factors and Hazard Communication Expert
Rimkus
Ann Arbor, Michigan
Human Factors, Warnings & Labels
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Chemical Risk Communication, Chemical Hazard Communication, Occupational Health and Safety, Consumer Product Safety and Warnings, User Response, Product Safety Evaluation, Medical Safety, Recreational Safety, Retail Safety, Occupational Safety, Premises Liability, ANSI Z535, ANSI Z129.1, ANSI Z400.1, Chemical Labeling, Warnings
Ms. Raina Shah is a Principal Consultant in the Human Factors group and directs chemical risk communication activities. She has extensive experience in litigation matters related to chemical hazard communication, occupational health and safety, and consumer product safety and warnings. Her activities have included researching user response to warnings and instructions; evaluating product safety information in consumer, medical, recreational, retail, and occupational contexts; analyzing product and occupational accidents and premises safety issues; and providing general safety and human factors consultation.
Ms. Shah has played an active role in national standards for consumer product warnings and instructions (ANSI Z535), chemical labeling (ANSI Z129.1), and material safety data sheets (ANSI Z400.1), and she has regularly guest lectured at the University of Michigan on topics including hazard communication, driver distraction, and uncertain health and safety risks.
Ms. Shah holds ...
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George B Page, BSE, MSE, CPE
Page Engineering, Inc.
Jackson, Michigan
Human Factors, Safety
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Ergonomics, Health and Safety, Industrial Hygiene, Physical Demands Assessments, Usability Testing, Accident Reconstruction, Biomechanical Modeling, Vibration Measurement, Compliance, Occupational Risk Management, Return to Work, Regulatory and Consensus Standard Initiatives
Page Engineering is a professional consulting firm that combines Ergonomics, Industrial Engineering, and Health and Safety expertise. We have served industry leaders in the areas of Transportation, Shipping, Manufacturing, and Health Care throughout North America. Our approach is bolstered by years of litigation scrutiny and backed by extensive application of ergonomics, human factors, epidemiologic, and occupational medical scientific literature. We specialize in human factors and ergonomics assessments, including both acute and cumulative exposures.
George Page is a Certified Professional Ergonomist. He earned his MSE in Industrial and Operations Engineering (Ergonomics) from the University of Michigan. George is also a Ph.D. candidate at the University of Michigan in Industrial and Operations Engineering (Ergonomics). The topic of his dissertation is: “Functional grip strength: conceptual and empirical models of biomechanical, perceptual, and tribological factors.” In the 1980s...
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Mark R. Lehto, PhD
Ergonomics, Chemicals, Artificial Intelligence
J.M. Miller Engineering, Inc.
Ann Arbor, Michigan
Warnings & Labels, Ergonomics
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Accident Investigation, Ergonomics, Boating Safety, Accident Modeling, Aquatics, Human Factors, Marine Accident, Instructions, Chemicals, Labels & Warnings, Restraint System, Effectiveness, Child Safety, Safety Equipment, Machine Learning, Consumer Product, Slip Trip & Fall, Artificial Intelligence
There are four PhD and registered Professional Engineers at Miller Engineering who are celebrating 40 years of Professorships at three universities along with providing services to Government, Insurance, and Industry - through research, publications, presentations, and expert testimony. These co-founders and associates are James M. Miller, PE, PhD; Mark R. Lehto, PhD; James M.L. Miller, MS, PhD, EIT; Adam M. Olshove, PE, MSE; and Jeffrey D. Rupp, MSE. Miller Engineering has a dedicated office with a full-time staff of engineers, researchers, and technical writers. The span of our collective academic and experiential expertise includes the Mechanical, Electrical, Chemical, Agricultural, Industrial, Human Factors, Ergonomic and Safety fields of engineering.
Miller Engineering also designs and operates hydroelectric and solar energy sources within their agricultural, forestry, marine, and cattle subsidiary operations in Idaho and Oregon, lending to unique hand-on expertise in these a...
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Brian C. Grieser, P.E., C.P.S.M., CSP, CPE
Human Factors and Marine Engineering Expert
Rimkus
Ann Arbor, Michigan
Human Factors, Premises Liability
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Naval Architecture, Marine Engineering, Industrial and Operations Engineering, Product Liability, Slip Resistance, Slip Trip and Fall, Recreational Boat Design, Watercraft Occupant Safety, Towed Watersports Safety, Time and Motion, Work Sampling, Human Vibration & Acceleration Exposure, Sound Measurement and Analysis
Mr. Brian Grieser holds a bachelor’s degree in Naval Architecture and Marine Engineering and a master’s degree in Industrial and Operations Engineering from the University of Michigan.
Mr. Grieser has extensive experience in conducting evaluations in a wide range of product, occupational, and premises projects involving litigation as well as proactive consulting. His assessments have included walkway slip resistance; recreational boat design; watercraft occupant safety; towed watersports safety; time and motion studies; work sampling; human vibration and acceleration exposure; sound measurement and analysis; and human movement, climbing, and stability analysis.
Mr. Grieser is a member of several professional societies including the Human Factors and Ergonomics Society, ASTM International, the Society of Naval Architects and Marine Engineers, the American Boat and Yacht Council, and USA Water Ski & Wake Sports. Mr. Grieser has authored publications addressing recreational boat de...
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Daniel S Holmes
Eagle Lake, Minnesota
Accident Reconstruction
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Accident investigation, accident reconstruction, air bag, CDR, EDR, time distance, speed, vehicle inspection, bicycle, commercial vehicle, motorcycle crash, pedestrian, scene photography, aerial photography, drone, occupant kinematics, human factors, sight lines, vehicle equipment, tire failure
My name is Daniel Holmes and I am retired from the Minnesota State Patrol with nearly 27 years of experience. While working for the Minnesota State Patrol I reconstructed over 170 serious or fatal crashes. I have also investigated over 1,500 motor vehicle crashes that did not rise to the level of requiring a crash reconstruction. In 2015, I was awarded the Minnesota State Patrol Award of Excellence in Crash Reconstruction for my work.
I am A.C.T.A.R. ( National Accreditation Commission for Traffic Accident Reconstruction) certified. I am trained as a C.D.R. ( Crash Data Recorder) analyst-technician and have the ability to image and analyze the airbag data from supported vehicles. I am a Forensic Mapper and drone operator. I have the ability to generate scaled diagrams from a crash scene or use mapping data obtained from Law Enforcement. I am also trained in Occupant Kinematics, and have reconstructed several pedestrian/bicycle accidents along with commercial vehicle crashes....
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Christopher E. Janson, MS, CSP, CHMM
Haines, Janson & Associates LLC
St. Louis, Missouri
Safety, Premises Liability
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Slip Trip & Fall, Retail Safety, Equipment & Machinery, Human Factors, Slip Resistance, Accident Investigation/Reconstruction, OSHA, Guarding, Failure Analysis, Construction, Industrial & Premises Accidents
Haines, Janson & Associates provides safety and risk management consulting services. Christopher E. Janson, Board Certified Safety Professional (CSP); Certified Hazardous Materials Manager (CHMM); Certified User of the English XL slip resistance measuring device (CXLT). Mr. Janson has held safety management positions with several Fortune 500 companies. He has also worked with a variety of firms as a consultant for the insurance industry. Mr. Janson is a professional member of the American Society of Safety Engineers.
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Jason C Fries
3D Forensic, Inc.
Nevada
Accident Reconstruction, Human Factors
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Nighttime Visibility, Line-of-Sight Analysis, Driver's Perspective Animation, 3D Video Reconstruction, Use-of-Force Reconstruction, Officer-Involved Shooting Reconstruction, Use-of-Force Human Factors, Ballistic Trajectory Analysis, Photogrammetry, Laser Scanning, Forensic Animation
Jason C. Fries is the CEO and lead forensic expert of 3D Forensic, Inc. He has worked on forensic analyses and productions since 1997 and has since become one of the most reputable forensic voices in the industry. Fries’s innovations in multiple forensic specialties have enabled 3D Forensic to offer some of the most comprehensive services in the nation.
Fries developed his forensic prowess through research in use-of-force incidents at the Force Science Institute, completing the Advanced Specialist certification. He also graduated from San Diego State University with a BS in Biology and focuses in Physics and Chemistry.
Throughout his years as CEO of 3D Forensic, Jason has successfully infused forensic testimony, visualization, and analysis to the company’s casework, earning the trust and recognition of California and the nation’s most influential attorneys. He has written numerous pieces for forensic and legal publications including Forensic Magazine, Claims Magazine, Internationa...
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Eric R. Anderson
Motorcycle, Powersports, Scooter, Offroad Expert
Motorcycle Forensics Expert (.com)
Carson City, Nevada
Transportation, Motorcycle
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human factors, street motorcycles, motorcycle racing, motocross racing, trail riding, dirt bikes, adventure motorcycling , UTVs/ATVs, Vehicle Inspection, Motorcycle Safety Foundation Rider Coach, Recreational Off-Highway Vehicle Association Coach, collision avoidance, e-scooters, motorcycle helmets , off-highway vehicles
As a powersports businessman, protective helmet/apparel manufacturer and rider for more than 50 years, Eric Anderson has built a vast base of knowledge related to motorcycles, ATVs, UTVs, scooters, micro-mobility vehicles, and off-road vehicles. He has been an MSF certified Rider coach as well as a ROHVA certified Driver Coach. He began working with the Motorcycle Industry Council (MIC) and Motorcycle Safety Foundation (MSF) in the early 1980s before entering the business side of powersports building and marketing protective apparel and helmets. Later in the 2000s, he became an elected Board member to the MIC 10 times for a total of 20 years of experience directing the industry from the highest levels. Founding Scorpion Sports with its associated ScorpionExo brand of helmets and protective apparel was an industry success story touted by trade magazines and thousands of dealers who recognized the disruptive marketing, unique distribution channel and price viability of the fast-growin...
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Mohammad Atarod, PhD, PE
Testifying Expert-Accident Recon and Biomechanics
Atarod Biomechanics Laboratories
Nevada
Biomechanics, Accident Reconstruction
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Accident Reconstruction, Biomechanical Analysis of Injury, Premises Liability, Slips/Trips and Falls, Crash Data Retrieval, Heavy Vehicle EDRs, Blackbox Download, Photogrammetry, Computer Simulations, Failure Analysis, Human Factors, Laboratory Testing, 3D Laser Scanning, Expert Witness Testimony
I am a Senior Biomechanical Engineer and Accident Reconstructionist. I am registered as a professional mechanical engineer (PE) in California, Nevada and Colorado. I specialize in accident reconstruction, injury biomechanics and injury mechanism/causation analysis. I works on cases across the country, analyzing injuries in automotive collisions, industrial accidents, workers compensation claims, premises liability claims, slip/trip and falls, and sport/recreation accidents. I have provided litigation support to insurance companies, law firms, and automotive manufacturers/industries over the past 12+ years.
Technical Areas of Specialization:
- Biomechanical Analysis of Injury
- Accident Reconstruction
- Premises Liability; Slips/Trips and Falls
- Crash Data Retrieval; Heavy Vehicle EDRs
- Photogrammetry and 3D Computer Simulations
- Vehicle Systems Analysis
Services:
- Accident Reconstruction
- Biomechanical Analysis of Injury
- Premises Liability; Slips/Trips and Falls
- Crash Dat...
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Kristopher J. Seluga, M.S., PE
Technology Associates, LLC
New York
Accident Reconstruction, Products Liability
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Mechanical Engineering, Biomechanics, Automotive, Construction, Engineering, Failure Analysis, Forensic Science, Golf Carts, Human Factors, Motorcycle, Premises Liability, Safety, Slip Trip & Fall
Our staff of experienced engineers are ready to apply established scientific and engineering knowledge and techniques to your case. Our staff has published hundreds of papers, served on national ANSI standards committees and assisted over 2,800 attorneys and insurance agents settle or try their cases.
Because the laws of physics and principles of engineering are universal, we are able to investigate and opine on a wide range of topics including motor vehicle crashes, heavy machinery, consumer products, construction sites, falls and biomechanical analyses. In each case, we assist our clients by determining, in as much detail as possible, how and why an accident occurred and communicating those finding in a clear and concise manner.
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C.J. Abraham, PhD, P.E., DPE, JD, FRSC, FTI, DEE, IH
Great Neck, New York
Products Liability, Slip Trip & Fall
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Athletics & Recreation, Safety, Safety Engineering, Warnings & Labels, Industrial Hygiene, OSHA, Risk Analysis, Biomechanics, Engineering, Fires, Explosions, Human Factors, Brain Injuries, Personal Injury, Trampolines, Amusement Parks, Water Parks, Playground Accidents
Dr. Abraham is a licensed P.E. and a Senior Member and a Diplomat in The National Academy of Forensic Engineers. Over the last 45 years, C. J. Abraham has created warnings and instructions for many products and protocols applied and used worldwide. He has consulted to major news channels, NHTSA, OSHA, NIOSH, State of California (CaITrans), Microsoft, New York Transit, Queensborough Bridge Authority, Department of Agriculture, the Federal Government, State Attorney General's Offices, and municipalities throughout the United States, Canada and Europe in a variety of technical areas.
His interests include head and brain protection in sports and recreation and personal injury accidents and litigations. In addition, he is also involved in the reconstruction of all types of sports injuries in a large variety of recreational and sports activities, amusement and trampoline facilities, as well as accidents involving a variety of products and vehicles. His background may be found at www...
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Caroline A Strazis
Expert Causality Analyst; Hospital Sentinel Harm
CA Strazis Clinical Legal Consulting, PLLC
Durham, North Carolina
Radiology, Legal Nurse Consulting
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Root Cause Analysis, Clinical Decisions, Human Factors, Healthcare Systems/Operations, Unexpected Death, Diagnostic Error/Delay, VTE Prophylaxis, Fall with Injury, Central Venous/Vascular Access, Cardiac/Physiologic Monitoring, Moderate Sedation, Procedural Error/Complication, Resuscitation, Failure to Escalate/Rescue
Caroline A. Strazis, MSN, RN, CNL, CPPS
Masters in Science of Nursing, Healthcare Systems (MSN) - University of North Carolina at Chapel Hill
Registered Nurse (RN) - North Carolina Board of Nursing
Clinical Nurse Leader (CNL) - American Association of Colleges of Nursing
Certified Professional of Patient Safety (CPPS) - Institute for Healthcare Improvement
CA Strazis Clinical Legal Consulting, PLLC
I am a clinical-legal consultant and registered nurse with 12 years of experience spanning high-acuity clinical work and investigative experience. I specialize end-to-end management of complex investigations with speed and precision and am comfortable delivering highly visible findings under sustained executive, legal, and regulatory scrutiny. I am formally trained and certified to perform full causal analysis on events ranging from geriatric falls with injury to catastrophic harm and unexpected death.
Root cause analysis is a core discipline within systems science and is setting-agno...
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Kevin A Rider, PhD, PE, CHFP
Human Factors Expert
Forensic Human Factors, LLC
Delaware, Ohio
Human Factors, Traffic Engineering
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Distracted driving, Driving behavior, Reconstruction, Biomechanics, Maritime, Manufacturing, Mining, OSHA, Premises Liability, Products Liability, Safety, Slips, Trips, Falls, Transportation, Warnings, Conspicuity, Cell phones, Texting, Lighting
Dr. Kevin Rider is a human factors expert and owner of Forensic Human Factors, LLC, providing investigations, reports and expert testimony for personal injury cases – plaintiff and defense. His expertise involves investigating how people interact with other people, products and environments in predictable ways, and applying this understanding to effective, efficient and safe products, services and systems. He has been consulted as an expert in 49 states (so far).
Dr. Rider’s expertise includes:
• MVAs and pedestrian collisions, incl. trucks, trains, buses, motor/bicycles
• Illumination, nighttime visibility, and conspicuity
• DUI/DWIs, where intoxication was not a proximate cause of crash
• Adequacy of product designs and warnings
• The design and maintenance of safe civil and occupational environments
• Premises liability, and slips, trips and falls
• Workplace and construction safety
Dr. Rider is a Professional Engineer (PE), a Certified Human Factors Professional (CHFP), and ...
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Helen Zienkievicz, APRN-CNP
Airline Cabin & Ground Safety Expert & Consultant
Cabin Safety Consultants
Moore, Oklahoma
Aviation & Aerospace, Safety
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Air Carrier Access Act, Flight Attendant Emergency Procedures, Safety Investigator, Medical incidents and injury, Complaint Resolution Official, Pilot Emergency Training, Passenger De-escalation, Regulatory Compliance, Threat Error Management, Safety Management Systems, Human Factors, Industry Standards & Practices
Expert witness, consultant, program developer, trainer and internationally recognized speaker on commercial airline flight attendant and gate personnel training, performance, safety, industry standards and FAA regulatory compliance. More than 40 years of experience in the commercial aviation industry; holding such positions as: Manager of Health, Safety and Security for Inflight Division, Senior Inflight Safety Investigator, Emergency Procedures Instructor for pilots and flight attendants, Station Manager, flight attendant and customer service supervisor. Other aviation roles included Chairperson of an FAA supported Aviation Safety Action Program for flight attendants, member of the Air Transport Association (A4A) Cabin Operations Committee and co-developer of Passenger Incident Review Committee process for addressing passenger misconduct incidents on a major global airline. Has provided expert witness, consultation services, reports and testimony for both plaintiff and defense case...
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Francesco Biondi
Distraction Attention Cellphone Autopilot Expert
Red Rock Human Factors Consulting
Windsor, Ontario
Human Factors, Transportation
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Driver distraction, Distracted driving, automated, autopilot, fatigue, cellphone, accident, behavior, perception reaction times, trucking, reaction times, Mobile, multitasking, driving, drowsiness, autonomous driving, self-driving, behaviour, PRT, attention
Dr. Francesco Biondi is a Human Factors specialist and expert witness with extensive experience analyzing how attention, perception, cognitive workload, and decision‑making influence driver behavior and accident outcomes. His work spans distracted driving, human‑machine interaction, driver monitoring, and the behavioral mechanisms that contribute to crashes in both manually driven and partially automated vehicles. A core area of Dr. Biondi’s research focuses on driver distraction and over‑reliance on partially automated driving systems, including Tesla Autopilot and other Level 2 systems. His studies investigate how automation affects driver attention, situational awareness, hazard detection, trust, misuse, and fallback performance. He frequently evaluates cases where questions arise about automation complacency, driver disengagement, system alerts, and human‑factors expectations in automation‑related crashes. Dr. Biondi has served as an expert witness in both Canada and the United ...
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Gavan Dunleavy, Capt.
Unlimited 1st Class Pilot / Maritime Operations
Yardley, Pennsylvania
Maritime, Safety
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Shiphandling, Maritime Incident Analysis, Shipyard Safety, Tugboat Operations, Harbor Pilot, Human Factors, Confined Space Entry, Maritime Safety, Maritime Procedures, Ship Repair Operations, Vessel Operations, Hazardous Liquid Cargo, Maritime Technology, Navigational Safety, Tank Vessel Operations, Maritime Training
Capt. Gavan Dunleavy is an active Delaware River docking pilot, maritime consultant, and former U.S. merchant seafarer with over a decade of operational experience involving tanker operations, ship handling, tug/barge operations, and the transportation of crude oil, refined petroleum products, and chemicals. As a harbor docking pilot he conducts docking and undocking operations involving large ocean going vessels including Aframax and Suezmax tankers up to approximately 200,000 deadweight tons, large containerships, bulk carriers, and chemical carriers. His background includes extensive experience in harbor maneuvering, docking operations, Z-Drive tugboat operations, marine casualty analysis, shipyard repair, confined space safety, pollution prevention and vessel operational safety.
In addition to active pilotage duties, Capt. Dunleavy provides maritime consulting and expert witness services involving vessel operations, maritime safety practices, ship handling, tug/ship interaction...
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Linda van Roosmalen, PhD
Wheelchair transportation and device safety expert
LINC Design LLC
Gibsonia, Pennsylvania
Transportation, Industrial Design
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wheelchair transportation, human factors, public transit, railcar boarding, accessible air travel, wheelchair securement, wheelchair restraint, seatbelt, crash safety, ergonomics, accessibility, paratransit, wheelchair lift, medical device, ramp, school bus, walker safety, warnings, usability, ADA
Dr. Linda van Roosmalen brings over 25 years of experience in wheelchair transportation safety as a designer and researcher at the University of Pittsburgh. She is a key member of a select group of experts dedicated to researching Wheelchair Transportation Safety. Over the past two decades, Dr. van Roosmalen has been retained by both plaintiff and defendant councils, providing her expertise in various cases, including:
• Wheelchair transport safety on school buses, public buses, paratransit, non-emergency transport, private vehicles, rail systems, and airplanes.
• Lift and ramp access.
• Securement of wheelchairs and scooters, along with associated labeling.
• Seat belt restraints for wheelchair-seated occupants and related labeling.
• Accessibility for wheelchair users in various environments, such as sidewalks, crosswalks, bathrooms, amusement parks, and public vehicles.
With a strong background in Industrial Design Engineering and a decade of industry experience, Dr. van Roosmal...
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Karol Silva, Ph.D., M.P.H., CPSI
Child Safety and Supervision Expert
Rimkus
Blue Bell, Pennsylvania
Human Factors, Safety
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Adolescent development, Behavioral science, Child development, Failure analysis, Slip trip & fall, Adolescent safety, Caregiver behavior, Child psychology, Playground safety, Adolescent behavior, Child safety, Children’s products, Pool safety, Adult supervision, Child supervision, Consumer product safety, Safety communication
Dr. Karol Silva is a human factors consultant with interdisciplinary training in child and adolescent development and public health. She holds a Ph.D. in developmental psychology from Temple University and master’s in public health from Brown University and is a Certified Playground Safety Inspector (CPSI). A significant portion of Dr. Silva’s work addresses child and adolescent safety, with particular attention to risk behaviors, cognitive and motor development, contextual factors, and the role of caregiver supervision. She also evaluates how factors such as risk perception and hazard awareness contribute to accident patterns across age groups, and how caregiver practices shape health and injury outcomes.
She has conducted usability studies evaluating how children and adults interact with products in a range of environments. Her work considers human capabilities and limitations and the implications on product design, labeling, and safety communication. Dr. Silva has extensive expe...
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Ellen Szubski, M.S., Ph.D., CXLT, CPSI, AHFP
Human Factors Expert Witness-Consultant
The Warren Group, Inc.
Irmo, South Carolina
Human Factors, Premises Liability
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Accident Prevention, Risk Management, Illumination, Conspicuity, Visual Perception, Slip resistance, Playground Safety, Premises Liability, Lighting, Line of Sight, Driver Distraction, Roadway Markings, Environmental Conditions, Slip-Trip- Fall Evaluations, Workplace Injuries, Human Factors, OSHA
Ellen Szubski, Ph.D., is the senior human factors consultant at The Warren Group. She earned a Doctor of Philosophy in Human Factors Psychology and a Master of Science in Applied Psychology from Clemson University. Ellen is also a Certified XL Tribometrist, a Certified Playground Safety Inspector (CPSI), and a Certified Associate Human Factors Professional (AHFP).
Ellen worked in the Clemson Visual Perception and Performance Laboratory examining the factors contributing to the conspicuity of pedestrians and bicyclists in challenging road conditions, such as nighttime driving. She did her dissertation on “The Influence of Pedestrian Biological Motion on Time-To-Collision Estimates at Night”. Prior to entering the forensic field, Ellen planned and conducted experiments for a major bicycle manufacturer that improved bicycle conspicuity. She also conducted laser strike perception and performance studies for the Department of Defense.
Ellen applies her experience in Human Factors t...
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Leon Allan Kappelman, PhD
Software Project Expert: Technical & Human Factors
SOS Solutions LLC
Dallas, Texas
Software Engineering, Human Factors
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software project management, software development, software quality, defects/bugs, implementation, software intellectual property, budget disputes, schedule disputes, software disputes, bespoke software, software customization, ERP, SaaS, software workforce, source code analysis, requirements, methodology, contracts, legacy, enterprise
Leon Kappelman is a researcher, author, educator, and consultant to corporations, governments, and attorneys. Dr. Kappelman is a professor emeritus whose work as an advisor and expert witness for attorneys concerns cases that mainly focus on disputes concerning all kinds of software projects (including bespoke, cloud, SaaS, ERPs, packages, integrations, and combinations thereof), as well as intellectual property matters. His research, teaching, publication, and advising work centers on the human and technical dimensions of designing, building, implementing, managing, and operating computer-based information systems (IS). He testified before and submitted written testimony to the U.S. Congress regarding high-tech legislation, cybersecurity, and IS management in the federal government. His management consulting and litigation support clients include Fortune 500 companies (such as AT&T, IBM, Microsoft, Verizon), government entities (Including the White House, the United Nations, the US...
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Jahan Rasty, PhD, PE, MBA
Real-World Forensic Engineering, LLC
Lubbock, Texas
Engineering, Metallurgy
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Failure Analysis, Accident Reconstruction, Slip trip & fall, Trip & Fall, Products Liability, Human Factors, Intellectual Property, Forensic Science, Fire, Equipment & Machinery, Electricity, Biomechanics, Premises Liability
Jahan Rasty, PhD, PE, MBA is a tenured full professor of Mechanical Engineering at Texas Tech University (since 1988) where he also serves as the Director of newly established post-graduate Forensic Engineering Certificate Program, as well as the director of Materials Performance Characterization and Failure Analysis Laboratory. Dr. Rasty is also the founding president of Real-World Forensic Engineering, LLC, which is a boutique-style engineering consulting firm. He is an experienced engineering expert and has successfully testified in more than 250 cases and has conducted over 1,000 engineering investigations in the areas of consumer products and industrial machinery failures involving design, manufacturing and marketing defect issues. Professor Rasty is a licensed professional engineer in the state of Texas, and holds various forensic certifications in the fields of fire and explosion investigation (CFEI, CFII), as well as vehicle Crash Data Retrieval (CDR). He received his BS,...
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Wanda L Greaves Holmes, Ph.D.
Ergonomics, Human Factors- Former UCF Professor
Grey Matter Engineering & Research, LLC
Frisco, Texas
Human Factors, Biomechanics
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Biomechanics, Human Factors Engineering, Industrial Engineering, Ergonomics
Professional Summary
Dr. Greaves-Holmes is a scholar, professor, and professional engineer with expertise in ergonomics and biomechanics. Her work has been featured in research, professional publications, peer reviewed journals, as well as congressional legislation. Her extensive scholastic achievements and industry experience allows her to instruct at the higher education level and in the field. She served as a graduate level professor at the University of Central Florida while providing consultative industry services as CEO of Gray Matter Engineering and Research.
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Timothy V Ewell
Aviation Accident Investigator | Expert Witness
CONROE, Texas
Aviation & Aerospace, Motorcycle
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Aircraft Accident, Aircraft Incident, Pilot Error, Mechanical Failure, Aviation Maintenance, Challenger , Corporate Jet Accidents, King Air, Director of Operations, Chief Pilot, NTSB, General Aviation, Part 135, Human Factors, Accident Reconstruction, Fleet Maintenance, Aircraft Accident Investigation, Test Pilot, Hawker, Cessna
Timothy (Tim) Ewell is a highly credentialed aviation expert witness and lead aircraft accident investigator with over 17,350 total flight hours, including 10,400 hours in Challenger series corporate jets (CL601/604/605/650 and Fusion), 2,550 hours in Hawker HS-125 series, and extensive King Air and other turboprop time. Several thousand in a myriad of smaller single engine aircraft. He holds an FAA Airline Transport Pilot certificate with type ratings on multiple Challenger models and the Hawker 800/850XP, along with current medical and international certifications. Mr. Ewell has served as Director of Operations and FAA-designated Check Airman , Chief Pilot, Director of Marketing, and Maintenance Director, managing flight departments and large fleets (including 10+ aircraft Part 135 certificate holders). A former U.S. Army Captain (Infantry/Aviation specialty, test pilot, and pilot for the White House and the Pentagon), he also owned and operated a commuter airline in Alaska, a Fix...
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Brian D Baxter, MS
Force Science, Ltd. - CEO, Brian Baxter
Force Science, Ltd.
Austin, Texas
Police Practices & Procedures, Human Factors
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Use of Force, Response to Resistance, De-escalation, Less Lethal, Law Enforcement, Police, EMT, Duty to Intervene, Force, Deadly Force, Defensive Tactics, Arrest and Control, Ground Control, Excessive Force
Brian Baxter is a Use of Force and Police Practices expert and the Chief Executive Officer of Force Science. Ltd. where, in addition to research and public safety training, his team is dedicated to honest accountability and informing triers of fact by analyzing human performance during high pressure, time-compressed encounters.
Brian is a retired, 30-year veteran of the Texas Dept. of Public Safety where he served as a patrol trooper, a SWAT team member, an undercover narcotics agent, an organized crime investigator, and a people leader from first-line supervisor to senior executive. Brian has a Bachelor of Science in Criminal Justice and a Master of Science in Applied Psychology and is a combat infantry veteran of Operation Iraqi Freedom.
Brian was the primary author for his former agency's use of force policy as well as the policy that created the agency-wide Use of Force Review Board. Brian served as the chair of the firearms discharge review board and subsequently the Use of F...
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Bryan Netherland, MS, MBA, CSP, CSHO, ARM
Safety Expert Witness-OSHA, LOTO, Machine Guarding
Seek Safety Consulting
Austin, Texas
Safety, OSHA
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Risk Management, Root Cause Analysis, Lock Out Tag Out, LOTO, Machine Guarding, Forklift, Ergonomics, Amputation, Human Factors, Laceration, Accident Investigation, Emergency Response, Industrial Manufacturing Safety, Fall Protection, Workplace Injuries, Robotics, Automation
Bryan S. Netherland, MS, MBA, CSP, CSHO, is a trained expert witness specializing in OSHA compliance, workplace safety, and accident investigation. He brings over 15 years of leadership experience in Environmental Health & Safety across Fortune 500 and global manufacturing companies, including Amazon, Berry Global, and Aurora Material Solutions. Mr. Netherland has directed enterprise-level OSHA compliance strategies and conducted hundreds of incident investigations.
He holds dual graduate degrees, a Master of Science in Occupational Safety & Health and an MBA in Sustainable Business, and is a Certified Safety Professional (CSP) and Certified Safety & Health Official (CSHO). His areas of expertise include high-hazard program management (Lockout/Tagout, confined space, machine guarding, arc flash/NFPA 70E, respiratory protection, powered industrial trucks), policy creation, risk assessment, safety management systems, and organizational safety culture.
In addition, Mr. Netherland ser...
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Bruce Champagne, B.S., MPA
Human Factors/Police Practices/Self-Defense
Quadrant Operations, LLC
Sandy, Utah
Police Practices & Procedures, Human Factors
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Police Uses of Force, Police Practices & Training, Civilian Self-Defense, Biomechanics, Investigations, Memory, Martial Arts, Criminal Gangs, Behavioral Profiling, Crime Analysis, Specialized Interviews, Tactical Operations, Aquatic Crime Scenes & Investigations, Human Factors analysis
As a decorated law enforcement officer with service in both urban and rural municipal agencies and a county sheriff’s department, Bruce Champagne has completed assignments as a field training officer, patrol and investigations supervisor, corrections officer and supervisor, criminal gang investigator, forensic diver, major crimes detective, civilian review board representative, SWAT leader and member, and firearms/defensive tactics instructor. Bruce was a previous president of the Utah Tactical Officers Association, Utah Gang Investigators Association, Utah Forensic Divers Association, and Utah Peace Officers Association.
Bruce is a member of the International Law Enforcement Educators and Trainers Association (ILEETA), Academy of Criminal Justice Sciences, International Association of Forensic Criminologists, Association of Force Investigators, Society for Integrity in Force Investigation and Reporting, and National Tactical Officers Association (NTOA), and is a certified instruct...
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Deborah E Dickerson, PhD CIH CSP
Product warnings, labels, instructions
Dickerson Consulting LLC
Blacksburg, Virginia
Products Liability, Warnings & Labels
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Injury, Illness, Product Liability, Premises Liability, Industrial Accidents, Warnings and Labels, OSHA, Worker's Compensation, Human Factors, Safe Equipment Design, Respiratory Protection, Respiratory Illness, Chemical Exposures, Dust, Asbestos, Silica, Lead, Temperature Extremes, Laboratory Safety
Expertise in: product design and safety; design of product warnings and labels; chemical exposure risks, analysis, and health outcomes; industrial system design, safety, and training.
I am an associate professor of safety engineering and human factors engineering and the Director of the Product and System Safety Laboratory in the Grado Department of Industrial and Systems Engineering at Virginia Tech in Blacksburg, VA.
I hold MS and PhD degrees in safety engineering and the certified safety professional (CSP), certified industrial hygienist (CIH), and certified hazardous materials manager (CHMM) credentials.
I have over 30 years of experience in the fields of industrial hygiene and safety engineering: conducting investigations and designing safe work systems. I led a compliance organization responsible for conducting investigations and ensuring compliance with safety and health standards (OSHA and EPA).
I have 21 years of university teaching experience and have taugh...
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Dennis K McBride, Ph.D., MSSM, MSPA/MPA, CPE
U.S. Designated Expert in Engineering Psychology
Institute for Regulatory Science (President)
Woodbridge, Virginia
Human Factors, Behavioral and Social Sciences
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Neuropsychology, Aerospace Physiology, Aerospace Psychology, Accident Analysis, Kinesiology, Psychometrics, Intelligence Testing, Stastistics, Time and Motion Analysis, Military Legal, Pilot Selection & Training, Regulatory Science, Disabilities, Biostatistics, Modeling Simulation, Decision Sciences
Highly experienced, award-winning expert in support of legal issues, strategy/sworn testimony, ranging from expert witness in criminal and civil cases, JAG Investigations, impaired driving charges/defense, up to, and including primary co-authorship of key invited, consequential amicus briefing(s) to the U.S. Supreme Court.
* B.S., M.S., Ph.D. in behavioral neuroscience, University of Georgia
* M.S. in Systems, Viterbi School of Engineering, University of Southern California
* M.S.P.A./MPA, Public Administration (Regulatory Affairs), Troy State University
* A.A. Chemistry, Macon State College
* Designation, Naval Aerospace Experimental Psychologist, Navy Flight Surgeon Class 80-1, Naval Aerospace Medical Institute
* Certification in Ergonomics, Board of Certification in Professional Ergonomics
* Certification, Professional Modeling and Simulation - Modeling and Simulation Professional Certification Commission
* Master's level Certificate, Biostatistics (Institute of Statisti...
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Jeffrey Hickman, Ph.D.
Human Factors and Transportation Expert
Rimkus
Richmond, Virginia
Human Factors, Slip Trip & Fall
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Behavioral Safety, Warnings, Occupational/Industrial Safety, Vehicle Operator Behavior, Fatigue, Drowsiness, Duty Status, Attention, Glance Patterns, Electronic Device Use, Drugs & Alcohol, Regulations, Advanced Driver Assistance Systems (ADAS), Automated Driving Systems (ADS), Infotainment Systems, Driver Sleep Patterns
Dr. Jeffrey Hickman has a B.S. in Psychology from the University of Florida and a Ph.D. in Clinical Psychology from the Virginia Polytechnic Institute and State University. His Ph.D. research focused on behavioral safety and safety in large-scale systems. After completing his Ph.D., Dr. Hickman was employed at the Virginia Tech Transportation Institute for 18 years. He has considerable experience assisting clients to understand human factors issues related to warnings, slips/trips/falls, occupational/industrial safety, and vehicle operator behavior.
Dr. Hickman's safety research and experience include human factors, behavior, fatigue, drowsiness, duty status, attention, glance patterns, electronic device use, regulations, drugs and alcohol, warnings, advanced driver assistance systems (ADAS), automated driving systems (ADS), and many other safety technologies. Dr. Hickman investigated the effects of visual displays and infotainment systems on driver attention. His research on dri...
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Craig Rosenberg, Ph.D.
User Interface, Software Engineering, VR, AR, GPS
UI.EXPERT
Seattle, Washington
Human Factors, Software Engineering
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user interface, user interface design, mobile software, smartphones, software, software engineering, software architecture, virtual reality, augmented reality, GPS, human factors, display design, virtual environments, augmented environments, systems engineering, simulation, software development, UI, User Interface
Dr. Rosenberg has been retained over 160 times, has testified at 12 trials in both State and Federal courts, testified at over 60 depositions, and has written over 140 expert reports and declarations.
Dr. Craig Rosenberg has worked on many high-profile cases and advanced engineering projects for a wide range of Fortune 500 companies including Google, Samsung, Amazon, Boeing, IBM, Disney, Uber, Lyft, Huawei, Nintendo, BMW, Mercedes, Dell, AT&T, Zillow, Motorola, BlackBerry, Ericsson, LG, Sony, HTC, Mattel, United States Army and Air Force, Federal Aviation Administration and many others.
Dr. Rosenberg is the founder of Global Technica and is an accomplished human factors engineer, user interface designer, software engineer, and systems engineer with extensive expert witness experience specializing in user interface design and human factors issues for embedded, mobile, web, desktop, and server software.
Dr. Rosenberg specializes in software engineering, user interface design, infor...
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Jocelyn S Mamchur, PE
RRFB & Pedestrian Safety Expert
Mountlake Terrace, Washington
Traffic Engineering, Transportation
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Rapid Rectangular Flashing Beacon (RRFB), pedestrian safety, crosswalk expert, traffic signals, municipal engineering, standard of care, roadway lighting, ADA compliance, beacon failure, signal maintenance, traffic control devices, public agency liability, human factors, sight distance, MUTCD, pedestrian visibility
Jocelyn Mamchur, PE is a civil engineer with over 20 years of experience in municipal infrastructure design and operations. Her professional background includes roadway design, pedestrian facilities, traffic signals, roadway lighting, underground utilities, and ADA compliance within a large public agency environment.
Ms. Mamchur specializes in pedestrian safety systems, including Rapid Rectangular Flashing Beacons (RRFBs) and other pedestrian warning devices. Her expertise includes system design, placement, power and detection systems, visibility and conspicuity, inspection protocols, maintenance practices, and operational performance. She routinely evaluates issues involving partial system failures, device outages, sight distance, driver yielding behavior, and agency response to reported malfunctions.
She provides standard-of-care analysis for matters involving public agencies and consulting engineers, with a focus on real-world municipal practices, staffing constraints, document...
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