Expert Witness Directory

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Browse our verified directory of expert witnesses spanning medicine, engineering, finance, and dozens of specialized fields.

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Showing 181–198 of 1,756 experts

Civil Engineering
CR

Christopher R. Hanstad

P.E., CFM, MSCE

Champaign, IL17 years+ yrs★ 9.0

Christopher R. Hanstad, P.E., CFM, MSCE is a civil engineering expert specializing in FEMA floodway violations and hydrologic and hydraulic analysis. With a career encompassing floodplain modeling, stormwater analysis, and flood loss avoidance studies, he brings a comprehensive engineering perspective to litigation work. His work centers on investigating FEMA floodway compliance, assessing stormwater management practices, and evaluating flood damage assessment models. Mr. Hanstad has been retained in numerous expert witness and consulting engagements across Illinois, Indiana, Kentucky, and Wisconsin, involving FEMA floodway violations and floodplain modeling cases. His Master of Science in Civil Engineering, along with his Certified Floodplain Manager designation and professional engineering licenses in IL, IN, KY, and WI, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving hydrologic and hydraulic engineering.

FEMA Floodway ViolationsStormwater AnalysisFlood Loss Avoidance Studies+7
Civil Engineering
DT

David T. Williams

Ph.D., P.E., P.H., CPESC, CFM, F.ASCE, F. EWRI, D.WRE

Commerce City, CO45 years+ yrs★ 9.0

David T. Williams, Ph.D., P.E., P.H., CPESC, CFM, F.ASCE, F. EWRI, D.WRE is a water resources engineering expert specializing in sedimentation engineering and floodplain management litigation. With a career spanning civil engineering, hydrology, and hydraulic design, he brings a comprehensive understanding of complex water systems and their legal implications. His work centers on investigating sediment transport dynamics, assessing floodplain management practices, and evaluating whether engineering standards have been met in water resource projects. Mr. Williams has been retained in numerous expert witness and consulting engagements across the United States, involving FEMA floodplain studies, erosion control, and hydraulic engineering disputes. His Ph.D. in Civil Engineering, along with certifications such as Certified Professional in Erosion and Sediment Control (CPESC) and Certified Floodplain Manager (CFM), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving river hydraulics, sedimentation, and flood risk management.

HydrologyWater Resources EngineeringSedimentation Engineering
Police Procedures
AT

Aaron T. Olson

Consultant and Educator

Beavercreek, OR47 years+ yrs★ 9.0

Aaron T. Olson, M.Ed. is a police practices and human resources expert specializing in police procedures, use of force, and wrongful death litigation. With a career encompassing law enforcement leadership, human resources investigations, and academic instruction, he brings a multifaceted perspective to his litigation work. His work centers on investigating police conduct, assessing human resources practices, and evaluating whether standards of care were met in complex legal disputes. Mr. Olson has been retained in numerous expert witness and consulting engagements across Oregon and Washington, involving police misconduct, wrongful death, and employment discrimination cases. His Master of Education in Adult Education, along with certifications such as the Oregon private investigator license, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving police procedures and human resources practices.

Police PoliciesPolice InvestigationsPolice Interviews+17
Occupational Medicine
SE

Scott E. Singer

M.D., M.P.H.

Chagrin Falls, Ohio31 years+ yrs★ 9.0

Scott E. Singer, M.D., M.P.H. is an occupational medicine expert specializing in causation and industrial accident litigation. With a career spanning occupational health, sports medicine, and toxic exposure assessment, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating causation in workplace injuries, assessing compliance with occupational health standards, and evaluating whether industrial safety protocols were breached. Dr. Singer has been retained in numerous expert witness and consulting engagements across the United States, involving workers' compensation, industrial accidents, and toxic exposure cases. His M.P.H. in Occupational Medicine from The University of Michigan, along with Board Certification in Occupational Medicine and Medical Review Officer Certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving occupational health and safety.

Sports Medicine
Construction Defects
AT

Amin Terouhid

Principal Consultant

Upper Saddle River, NJ18 years+ yrs★ 9.0

Amin Terouhid, Ph.D., P.E. is a construction management and claims expert specializing in construction defects, delay and damages analysis, and construction safety. With a career encompassing diverse international and U.S.-based projects, he brings a multidisciplinary engineering perspective to litigation work. His work centers on investigating construction defects, assessing delay and damages claims, and evaluating whether construction safety standards were met. Dr. Terouhid has been retained in numerous expert witness and consulting engagements across the United States and internationally, involving construction claims, personal injury, and construction safety cases. His Ph.D. in Construction Management, along with certifications such as Planning and Scheduling Professional (PSP) and Design and Risk Management Professional (DRMP), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving construction management and safety issues.

OSHAConstruction ManagementConstruction Claims+3
Security and Premises Liability
DN

Drew Neckar

Principal Consultant

Strum, WI20+ years+ yrs★ 9.0

Drew Neckar, MBA, CPP, CHPA is a security and premises liability expert specializing in risk assessment and vulnerability identification. With a career spanning corporate security leadership and strategic program development, he brings a comprehensive framework for evaluating security protocols and compliance in litigation contexts. His work centers on investigating premises liability, assessing security program effectiveness, and evaluating whether industry standards have been met. Mr. Neckar has been retained in numerous expert witness and consulting engagements across the United States, involving cases in healthcare, hospitality, and educational institutions. His Master of Business Administration in conjunction with certifications such as Certified Protection Professional (CPP) and Certified Healthcare Protection Administrator (CHPA) reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving security program failures and premises liability.

Risk assessment & vulnerability identificationFacility security designSecurity policy & procedure review+12
Construction Defects
CL

Christopher L. Matthews

President and Principal

Jacksonville, Florida40 years+ yrs★ 9.0

Christopher L. Matthews is a building envelope systems expert specializing in disputes related to exterior building envelope system installation, performance, and design. With a career spanning over four decades in design, installation, and performance assessment, he brings a comprehensive framework to litigation work involving building envelope systems. His work centers on investigating water infiltration resistance, assessing hurricane readiness, and evaluating whether structural glazing systems meet industry standards. Mr. Matthews has been retained in numerous expert witness and consulting engagements across the United States and the Caribbean, involving construction defects and building inspection cases. His Bachelor of Science with High Honors in Business Administration from the University of Florida, along with certifications such as AWCI Certified EIFS Inspector and Certified Building Commissioning Professional, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving building envelope systems and water infiltration issues.

Building InspectionBuilding envelope systemsWater infiltration resistance+1
Mechanical Engineering
DM

David M. Hallman, M.S., P.E.

Consulting Mechanical / Materials Engineer

Maple Grove, MN30+ years+ yrs★ 9.0

David M. Hallman, M.S., P.E. is a mechanical engineering expert specializing in accident reconstruction and forensic investigations. With a career encompassing materials research, crash testing, and forensic mechanical analysis, he brings a multidisciplinary approach to litigation work. His work centers on investigating mechanical failures, assessing crash dynamics, and evaluating causation in vehicle-related incidents. Mr. Hallman has been retained in numerous expert witness and consulting engagements across the United States, involving cases such as vehicle mechanical failures, crash reconstructions, and fire investigations. His Master of Science in Materials Science and Engineering, along with certifications such as Certified Fire and Explosion Investigator and Certified Vehicle Fire Investigator, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving mechanical and vehicle systems.

Accident ReconstructionRoot cause analysis of mechanical incidents and failuresForensic Mechanical Engineering Investigations+10
Condominiums
CR

Christopher R. Lanni

CPP, CMCA, AMS

Hudson, Massachusetts39 years+ yrs★ 9.0

Christopher R. Lanni CPP, CMCA, AMS is a security and risk management expert specializing in premise liability and residential security assessments. With a career spanning security consulting, residential risk advising, and security technology implementation, he brings a strategic approach to evaluating security measures and risk mitigation strategies. His work centers on investigating security breaches, assessing risk management protocols, and evaluating whether security technologies meet industry standards. Mr. Lanni has been retained in numerous expert witness and consulting engagements across the United States, involving residential communities, commercial properties, and educational facilities. His Bachelor of Science in Criminal Justice with a Concentration in Private Security, along with certifications as a Certified Protection Professional, Certified Manager of Community Associations, and Association Management Specialist, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving security management and risk assessment.

TechnologyResidentialApartments+8
Police Practices & Procedures and Investigation
BA

Beth A. Mohr

CFE, FSA, CFCS, CAMS, CCCI, MPA, PI

Albuquerque, NM★ 9.0

Beth A. Mohr, CFE, FSA, CFCS, CAMS, CCCI, MPA, PI is a Police Practices & Procedures and Investigation expert specializing in allegations of police misconduct and use of force. With a career spanning law enforcement, fraud examination, and financial crimes investigation, she brings a multidisciplinary perspective to her litigation work. Her work centers on investigating police practices, assessing the validity of use-of-force claims, and evaluating whether investigative failures or cognitive biases have occurred. Ms. Mohr has been retained in numerous expert witness and consulting engagements nationwide, involving cases of police misconduct, fraud examination, and financial crimes. Her Master of Public Administration from the University of New Mexico, along with certifications such as Certified Fraud Examiner and Force Science Analyst, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving police ethics, investigative failures, and civil rights violations.

Fraud ExaminationFinancial Crimes Investigation
Toxicology
JH

Jennifer Harmon

Forensic Science Leader

San Diego, CA20+ years+ yrs★ 9.0

Jennifer Harmon is a forensic toxicology expert specializing in toxicology, drug analysis, and impaired driving investigations. With a career spanning forensic laboratory leadership, public policy advocacy, and expert testimony, she brings a multidisciplinary perspective to her litigation work. Her work centers on investigating drug-facilitated crimes, assessing drug and alcohol impairment, and evaluating whether forensic laboratory practices meet accreditation standards. Ms. Harmon has been retained in numerous expert witness and consulting engagements across California, involving cases related to drug-impaired driving, forensic toxicology, and crime laboratory operations. Her Master of Public Administration, along with certifications such as ISO/IEC 17025 & 17020 Lead Assessor & Technical Assessor, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving drug and alcohol impairment.

Forensic ScienceForensic Laboratory LeadershipAntemortem & Postmortem Toxicology+7
Traffic Engineering
MB

Michael Blankenship

Principal, Greenlight Traffic Engineering, LLC

Peoria, AZ34 years+ yrs★ 9.0

Michael Blankenship, PE, RSP 2I is a traffic engineering expert specializing in traffic crash litigation. With a career spanning traffic safety, transportation planning, and roadway design, he brings a comprehensive understanding of how engineering principles apply to legal disputes. His work centers on investigating traffic incidents, assessing roadway design compliance, and evaluating whether safety standards were met. Mr. Blankenship has been retained in numerous expert witness and consulting engagements across Arizona, New Mexico, Texas, Nevada, Montana, North Carolina, and West Virginia, involving vehicle, pedestrian, bicyclist, and motorcyclist crash cases. His M.S. in Civil Engineering (Transportation Specialization), along with his Road Safety Professional Level 2 Infrastructure Certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving traffic safety and engineering standards.

TransportationTraffic Safety
use of force
CJ

Chuck J. Rylant

Psy.D.

Arroyo Grande, CA25 years+ yrs★ 9.0

Chuck J. Rylant, Psy.D. is a use-of-force and self-defense expert specializing in police use-of-force, civilian self-defense, and human factors in high-stress situations. With a career encompassing law enforcement training, tactical instruction, and psychological analysis, he brings a multidisciplinary perspective to litigation work. His work centers on investigating police use-of-force incidents, assessing civilian self-defense claims, and evaluating whether human factors influenced decision-making under pressure. Mr. Rylant has been retained in numerous expert witness and consulting engagements across the United States, involving police use-of-force cases, civilian self-defense claims, and law enforcement training evaluations. His Psy.D. in Psychology, along with certifications as a Certified Force Science Analyst and Advanced Force Science Specialist, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving police practices and self-defense scenarios.

police use of forcelaw enforcement use of forceself defense+21
Computer Forensics
MM

Michael M. Nelson

Business Owner

Moorestown, NJ18 years+ yrs★ 8.9

Michael M. Nelson is a digital forensics and cyber security expert specializing in incident response and eDiscovery. With a career encompassing digital forensics, cyber security, and information technology, he brings a comprehensive understanding of how to address complex digital investigations and cyber threats. His work centers on investigating digital breaches, assessing data integrity, and evaluating whether security protocols were breached. Mr. Nelson has been retained in numerous expert witness and consulting engagements across the United States, involving corporate, civil, criminal, and domestic cases. His B.S. Arts and Sciences in Computer and Information Sciences, along with certifications such as AccessData Certified Examiner (ACE) and Certified Information Systems Security Professional (CISSP), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving digital forensics and cyber security.

RansomwareHackingMetadata Analysis+19
Deep foundations
DE

Dr. Edward J. Garbin, Jr.

President, Principal Engineer

Saint Johns, FL20 years+ yrs★ 8.9

Dr. Edward J. Garbin, Jr., Ph.D., P.E., D.GE is a geotechnical engineering expert specializing in forensic evaluations and structural distress analysis. With a career spanning deep foundations, ground improvement, and earth retention systems, he brings a robust technical framework to litigation work. His work centers on investigating foundation integrity, assessing soil mechanics, and evaluating whether construction practices meet industry standards. Dr. Garbin has been retained in numerous expert witness and consulting engagements across the United States, involving complex geotechnical and structural cases. His Ph.D. in Civil Engineering (Geotechnical), along with his Diplomate, Geotechnical Engineering (D.GE) certification, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving foundation failures and soil stabilization issues.

Ground improvementEarth retention systemsStructural distress+12
Travel & Tourism
MF

Michael F. Stone

CTIE, CPCU

Fort Lauderdale, Florida34 years+ yrs★ 8.9

Michael F. Stone, CTIE, CPCU is a Travel & Tourism expert specializing in tour operating, travel standard of care, and travel supplier contracts. With a career spanning strategic partnerships, digital engagement solutions, and fiscal management, he brings a multifaceted perspective to litigation work. His work centers on investigating travel agency practices, assessing compliance with industry standards, and evaluating whether duty of care obligations were met. Mr. Stone has been retained in numerous expert witness and consulting engagements across the United States and the Middle East, involving tour operators, travel agencies, and cruise companies. His Bachelor of Science Degree in Hotel and Hospitality Management, along with certifications such as CTIE and CPCU, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of standard of care in disputes involving travel and tourism.

Safety
SR

Stanford R. Brown

Safety Consultant

Honolulu, HI30+ years+ yrs★ 8.9

Stanford R. Brown, B.Sc., CSP, CSHP, CRSP, CHSC is a safety and health management expert specializing in occupational safety and regulatory compliance litigation. With a career spanning safety management, hazard control, and construction safety, he brings a strategic framework to litigation work involving complex safety protocols and compliance issues. His work centers on investigating safety compliance, assessing hazard control measures, and evaluating whether industry standards were met. Mr. Brown has been retained in numerous expert witness and consulting engagements across North America, involving construction, mining, and various industrial sectors. His Bachelor of Science in Environmental Management, along with certifications such as Certified Safety Professional (CSP) and Canadian Registered Safety Professional (CRSP), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of causation in disputes involving workplace safety and regulatory compliance.

OSHASafety ManagementHazard Control
Security and Premises Liability
JF

James F. Pastor

Ph.D., J.D., C.P.P.

Naples, FL★ 8.9

James F. Pastor, Ph.D., J.D., C.P.P. is a security and premises liability expert specializing in legal issues related to security, policing, and public safety. With a career that spans tactical policing, legal representation, and academic research, he brings a multifaceted perspective to litigation work. His work centers on investigating security protocols, assessing liability in security breaches, and evaluating whether industry standards have been met. Mr. Pastor has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to security firms, police unions, and corporate security policies. His Ph.D. in Public Policy Analysis, along with certifications such as Certified Protection Professional (CPP), reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of responsibility in disputes involving security law, premises liability, and use of force.

SecurityPolicingPublic Safety+2
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