Exposure Expert Witnesses

Clearwater Beach, Florida

Industrial Hygiene, Indoor Air Quality - Exposure, Legionnaires, Legionella, Occupational Disease, Environmental IPAC, COVID, Epidemiology, Mold, Asbestos, Carbon Monoxide, Chemical Product Liability, Respirators, Roundup, Pesticides, Construction Nosocomial, Hazard Assessment, Aerosol Transmission, Respiratory Infection, Retrospective Exposure / Dose Estimation

75+ Engagements since 2017 / Adjunct Professor Emeritus - Occupational & Environmental Health, School of Public Health, University of Toronto / Member, American College of Epidemiology / Member, Association for Professionals in Infection Control and Epidemiology / Member, TLV Chemical Substances Committee - American Conference of Governmental Industrial Hygienists / Certified Industrial Hygienist (American Board of Industrial Hygiene) / Registered Occupational Hygienist (Canadian Registration Board of Occupational Hygienists) / Licensed Pesticide Applicator / Licensed Asbestos Project Supervisor / Managing Principal, Chief Executive and Majority Shareholder - Largest Canadian HSE Services Firm (>150 staff) www.crosssafety.ca / Offices: Canada - Ottawa, Toronto, Markham, Windsor. USA - Lexington, Clearwater / Canadian Citizen / E-2 USA Treaty Investor Visa (USA Work Authorization) / Secret Level II Security Clearance - Government of Canada / Engaged by US DoJ / Assignments throughou...

SAINT PETERSBURG, Florida

Toxicology, Laboratories & Testing - drug testing, opiate, hearing, exposure, dermal, false positives, fentanyl, methamphetamine, inhalation, touch exposure, toxicology, Delta 8, cocaine, environmental exposure, low level, residual, Marijuana, passive, metabolism, elimination

I am a PhD-level forensic and clinical toxicologist with over a decade of experience advising organizations, attorneys, and courts on complex toxicological, pharmacological, and regulatory matters. I served as the toxicologist for the federal courts drug testing contract for 3 years. In that role I testified at federal revocation hearings over 20 times concerning drug testing and wrote hundreds of formal letters of data interpretation for the courts. I also corresponded with attorneys and probation when the drug testing outcome may have been due to exposure or medication or diet. I have a National Registry of Certified Chemists board certification as a Toxicological Chemist, a MS and a PhD, and many years of experience directly operating laboratories.

Springfield, Missouri

Industrial Hygiene, Safety - Warnings & Labels, IAQ, Products Liability, Covid, Indoor Air Quality, Toxicology, Asbestos, Environmental, Mold, Legionella, Pesticides, Dermal Assessment, Exposure, Occupational Hygiene, COPD, Forensic Science, Environmental Engineering, Job Hazard Assessment, OSHA, Safety

Summary of Experience Board-Certified HSE Expert | Industrial Hygiene & Forensic Exposure Analysis I am a highly credentialed Health, Safety, and Environmental (HSE) expert with over 35 years of experience and a unique background spanning military leadership, corporate consulting, and forensic investigation. As a CIH, CSP, and CHMM. I provide specialized technical analysis and expert testimony regarding complex injuries and illnesses stemming from chemical, biological, and physical hazards. My forensic expertise focuses on the reconstruction of current and historical exposures to high-stakes substances, including asbestos, benzene, welding fumes, lead, mold, and pesticides. I have a proven track record of managing multidisciplinary teams of doctors, engineers, and scientists to investigate workplace incidents and product liability claims. A retired USAF Chief Master Sergeant (CMS) and former Superintendent Industrial Hygienist, I bring a level of discipline, leadership, and tech...

Hampton, New Hampshire

OSHA, Safety - Construction Safety, Workplace Safety, Industrial Hygiene, Toxicology, Training, Industrial, Manufacturing, Machine Guarding, Falls, Compliance, Environmental, Exposure, Health Hazards, Expert Witness, Accident, Risk Assessment, Respiratory, Chemicals, Hazard Communication, Investigation

Dr. Martin provides highly specialized expert witness and litigation support services for complex workplace injury, fatality, and OSHA citation cases. Working closely with counsel, she leverages her deep regulatory expertise to navigate severe OSHA enforcement actions, successfully employing defenses such as unpreventable employee misconduct and the Multi-Employer Citation Policy. Her proven track record includes reconstructing incident timelines, analyzing site configurations, and auditing historical training records to secure citation deletions, downgrade willful violations, and significantly reduce regulatory penalties. Beyond immediate litigation defense, Dr. Martin routinely assists legal teams and corporate clients in negotiating OSHA Consent Orders and executing post-incident corrective actions, including comprehensive safety management system upgrades and proactive hazard mitigation strategies. Dr. Martin has 36 years of experience in occupational safety and health consult...

Cheltenham, Pennsylvania

Industrial Hygiene, Mold - Certified Industrial Hygienist, Industrial Hygiene, Exposure Assessment, Exposure, Occupational Exposure, Exposure Reconstruction, Historical Exposure, FELA, Railroad, COVID-19, Bioaerosols, Indoor Air Quality, Diesel Exhaust, Chemical, Sick Building

Dr. Perez has served as an expert witness in over 100 cases and has extensive experience in writing expert reports as well as in providing oral deposition and trial testimony. He served as faculty at the Drexel University School of Public Health for 10 years. In this role he taught industrial hygiene and exposure assessment methods to public health graduate students. He also lectured on airborne contaminant exposure and environmental health to graduate engineering and medical students. He has conducted research in the fields of industrial hygiene and environmental health, published his results in the peer reviewed literature and presented his findings at various national and international environmental and occupational health conferences. He has been involved in international industrial hygiene work, lecturing and consulting in India and serving as an advisor to the government of Sri Lanka on issues of occupational health and worker exposure control. Based on his qualification...