Arborist Expert Witnesses

Arborist, Failure Analysis - Personal injury matters, Tree damage, Arboriculture, Tree failure investigations, Forensic arborist, Tree risk assessment, Tree disputes, Tree safety and biomechanics, Personal injury, Tree valuations, Insurance subrogation, Liability reports, Tree worker injury, Tree failure analysis, Tree failure investigation, Tree liability

Jason C. Miller is a forensic arborist and tree expert witness specializing in tree failure analysis, causation, and standard of care in arboriculture. He is retained in matters involving personal injury, property damage, and tree-related disputes, providing objective analysis and defensible opinions for both plaintiff and defense counsel. With more than 30 years of experience in the tree care industry, Mr. Miller has worked across all levels of arboriculture, from field operations to advanced consulting. His background provides practical insight into tree inspection, maintenance practices, and real-world limitations relevant to evaluating liability and risk. Mr. Miller is a Registered Consulting Arborist (RCA), ISA Board Certified Master Arborist (BCMA), Certified TreeCare Safety Professional (CTSP), and Licensed Tree Expert in New Jersey. His work includes site inspection, failure analysis, technical reporting, and expert testimony in legal proceedings. He has been retained in ...

Sacramento, California

Arborist - arborist expert witness, tree failure, tree risk assessment, ISA Board Certified Master Arborist, tree litigation, forensic arborist, California tree law, urban forestry expert witness, tree valuation, Wildfire Mitigation, vegetation management

Robert Warwick is a licensed attorney and ISA Board Certified Master Arborist (TX-4379BU) whose dual credentials position him among a rare class of expert witnesses capable of bridging the disciplines of arboriculture science and legal analysis within a single engagement. He is admitted to practice before the State Bar of California (No. 363124), the State Bar of Texas (No. 24148633), the District of Columbia Court of Appeals (No. 90036967), and the United States District Court for the Central District of California. He is the principal of The Law Offices of Robert Warwick, a Santa Clara, California civil litigation practice, and the founder of Everything Green, Inc., a California-based firm delivering vegetation risk, wildfire mitigation, and utility compliance solutions. Mr. Warwick earned his Juris Doctor from Golden Gate University School of Law in San Francisco in May 2024, where he served as Associate Editor of the Golden Gate University Law Review and as the Environmental La...

Palm Harbor, Florida

Arborist - Tree Risk, Tree Valuation, Tree Appraisal, Nursery Valuation Appraisals, Tree Preservation, Expert Witness, Pesticides, Eminent Domain Takings, Tree Farm Appraisals, Commercial Landscapes, Tree Failure

Joe Samnik, respected industry leader in the fields of arboriculture and horticulture, brings 59 years of experience to his role as an expert witness in arboriculture and landscape litigation. An ISA Certified Arborist with Tree Risk Assessment Qualification (TRAQ), Joe also has a license from the State of Florida Office of Entomology. He has provided expert testimony in over 1,000 cases, maintaining an equal balance between plaintiff and defendant representation. His unique contributions to the field include authoring Florida's statutory formula for appraising highway vegetation and creating the mathematical table of value for the Florida State citrus tree removal class action lawsuit. Joe has presented his research at five international arboricultural conferences and served as president of the Association of Eminent Domain Professionals, a distinguished organization of attorneys, CPAs, and appraisal experts. In addition to being the Founding President of the Florida Chapter of t...

Watkinsville, Georgia

Arborist, Biomechanics - Tree failure, severe weather, wind damage, forestry

25 years as university faculty; 4 expert witness experiences; > 70 published scientific journal papers; expertise in tree biomechanics, wind and tree interactions, and tree/forest damage from wind.

Woodbury, New Jersey

Arborist, Failure Analysis - Personal injury matters, Tree damage, Arboriculture, Tree failure investigations, Forensic arborist, Tree risk assessment, Tree disputes, Tree safety and biomechanics, Personal injury, Tree valuations, Insurance subrogation, Liability reports, Tree worker injury, Tree failure analysis, Tree failure investigation, Tree liability

Jason C. Miller is a forensic arborist and tree expert witness specializing in tree failure analysis, causation, and standard of care in arboriculture. He is retained in matters involving personal injury, property damage, and tree-related disputes, providing objective analysis and defensible opinions for both plaintiff and defense counsel. With more than 30 years of experience in the tree care industry, Mr. Miller has worked across all levels of arboriculture, from field operations to advanced consulting. His background provides practical insight into tree inspection, maintenance practices, and real-world limitations relevant to evaluating liability and risk. Mr. Miller is a Registered Consulting Arborist (RCA), ISA Board Certified Master Arborist (BCMA), Certified TreeCare Safety Professional (CTSP), and Licensed Tree Expert in New Jersey. His work includes site inspection, failure analysis, technical reporting, and expert testimony in legal proceedings. He has been retained in ...

Forest Grove, Oregon

Arborist, Arborist - Certified Arborist, Forester, Consulting Arborist, Tree Forensics, Tree & Landscape Appraisals, Tree Damage, Trees, Timber Trespass, Tree Risk Assessments, Forest Damages, Forest, Tree Health Assessments, Wildland Fire Damage Assessments

American Society of Consulting Arborists (ASCA) Registered Consulting Arborist (RCA) # 408, International Society of Arboriculture (ISA) Certified Arborist # PN 1068 A, ISA Tree Risk Assessor Qualified Pacific Northwest Chapter ISA Certified Tree Risk Assessor # 0150, Timber and Timberland Appraisal Course, USFS trained in forest fire fighting, root disease and animal damage identification, hazard tree workshop certified since 1978. Wildland fire 25 seasons experience in leadership roles, assessments of tree hazards and tree viability on fires and after fires. Over 40 years of field experiences. Servicing the western United States.

Pennsylvania

Arborist, Failure Analysis - Personal injury matters, Tree damage, Arboriculture, Tree failure investigations, Forensic arborist, Tree risk assessment, Tree disputes, Tree safety and biomechanics, Personal injury, Tree valuations, Insurance subrogation, Liability reports, Tree worker injury, Tree failure analysis, Tree failure investigation, Tree liability

Jason C. Miller is a forensic arborist and tree expert witness specializing in tree failure analysis, causation, and standard of care in arboriculture. He is retained in matters involving personal injury, property damage, and tree-related disputes, providing objective analysis and defensible opinions for both plaintiff and defense counsel. With more than 30 years of experience in the tree care industry, Mr. Miller has worked across all levels of arboriculture, from field operations to advanced consulting. His background provides practical insight into tree inspection, maintenance practices, and real-world limitations relevant to evaluating liability and risk. Mr. Miller is a Registered Consulting Arborist (RCA), ISA Board Certified Master Arborist (BCMA), Certified TreeCare Safety Professional (CTSP), and Licensed Tree Expert in New Jersey. His work includes site inspection, failure analysis, technical reporting, and expert testimony in legal proceedings. He has been retained in ...

Willow Street, Pennsylvania

Arborist, Failure Analysis - Tree failure, Tree forensics, Tree health, Tree risk assessment, Consulting arborist, Plant appraisal and valuation, Tree biomechanics, Tree care, Plant Damage, Property damage, Damage

As the owner of Oakwood Tree Care Professionals, Inc., I provide a unique blend of professional tree consulting, expert witness testimony, and hands-on tree care services. As an independent consulting arborist, I offer objective evaluations and clear reporting for attorneys, insurance firms, property managers, and municipalities. My work includes tree risk and safety assessments, forensic investigations, and valuation services to support both preventative planning and litigation needs. In addition to consulting, I also provide full-service tree care for residential and commercial clients. From health assessments and pruning to removals and storm damage response, every project is managed directly by me, ensuring both technical and high quality workmanship. With over 35 years of experience in both the field and the consulting space, I bring integrity, expertise, and personal accountability to each engagement, Every case and project is approached with clarity, professionalism, and a ...

Port Angeles, Washington

Arborist, Environmental - arborist, tree risk, tree appraisal, tree valuation, tree forensics, urban forestry, trees and construction, tree protection, tree safety, tree policy, urban forestry policy

Owner and principal consultant with Peninsula Environmental Group, Inc., based in Port Angeles, Washington. A Board-Certified Master Arborist (since 2018), a Registered Consulting Arborist (since 2019), Tree and Plant Appraisal Qualified, and Tree Risk Assessment Qualified. My career in the environmental industry began in 2003; practicing as a full-time consulting arborist, forester and urban forester since 2015. Professional portfolio includes individual tree and forest-wide health, disease and risk assessments, tree management around construction, urban forest management, tree and forest policy development, forest management, environmental restoration and tree appraisals for both public and private clients. Have assessed tens of thousands of individual trees and numerous private and public forested sites up to 5,000 acres, with approximately 50% of work devoted to tree forensics and expert witness testimony related to plant appraisals, tree death, views, tree care, and injury/d...

olympia, Washington

Arborist - Forestry, Electrocution, Vegetation Management, Integrated Pest Management, Arboriculture, Trees, Herbicides, Landscape Tree Appraisal, Utility Vegetation Management, Powerlines and Trees, Timber Appraisal, Wildfires, Tree Appraisal

Over 45 years experience in industrial, consulting, and utility forestry and vegetation management. On staff at the Purdue University School of Forestry for 7 years - Research, Extension and Director of Summer Forestry Practicum. BSF degree in forest management and MSF degree with emphasis in Silviculture and Forest Soils. Certified Forester, ISA Board Certified Master Arborist - Utility Specialist, and ASCA Tree and Plant Appraisal Qualified. ISA Tree Risk Assessor Qualified (2014-24). Licensed Pesticide Consultant. Have testified in depositions and trials 109 times. Primary focus of current services are to utilities when trees and powerlines get together and a wildfire results, or an electrocution. Perform many timber and landscape tree appraisals associated with wildfires and trespass.