Browse our verified directory of expert witnesses spanning medicine, engineering, finance, and dozens of specialized fields.
Showing 667–684 of 1,756 experts
Sheriff’s Sergeant (Ret.) | Police Practices & Criminal Investigations Expert
Anthony D. Turnbull, Sheriff’s Sergeant (Ret.) is a police practices and criminal investigations expert specializing in law enforcement procedures and investigative oversight. With a career spanning patrol, criminal investigations, and personnel supervision, he brings a comprehensive framework to litigation work involving police conduct and investigative protocols. His work centers on investigating officer-involved shootings, assessing in-custody death investigations, and evaluating whether law enforcement actions align with constitutional standards. Mr. Turnbull has been retained in numerous expert witness and consulting engagements across federal jurisdictions, involving cases such as wrongful convictions, malicious prosecution, and Monell liability. His Bachelor of Arts in Ethnic Studies, along with POST ICI & AICC Instructor and POST Drug Recognition Evaluator (DRE) certifications, 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 police practices and criminal investigations.
Executive Leader, Consultant, and Expert Witness
Dr. Saralyn Grass, Ed.D. is an Education & Schools expert specializing in school safety and instructional leadership litigation. With a career encompassing executive leadership in youth development and educational policy, she brings a strategic oversight perspective to litigation work. Her work centers on investigating compliance with daycare standards, assessing negligence in child injury cases, and evaluating whether mandated reporting protocols were followed. Dr. Grass has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to early childhood education, organizational performance, and child safety standards. Her Doctor of Education in Educational Policy & Leadership, along with her Master of Science in Human Development & Family Studies, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of standards of care in disputes involving early education and childcare licensing.
Board Certified Security Consultant
Don McGray, CPP is a security management expert specializing in premises liability and negligent security analysis. With a career spanning military, corporate, and consulting sectors, he brings a strategic perspective to litigation work involving security protocols and threat assessments. His work centers on investigating inadequate security measures, assessing threat levels, and evaluating whether security standards have been met. Mr. McGray has been retained in numerous expert witness and consulting engagements across the United States, involving cases in military, corporate, and residential property sectors. His BBA in Finance, along with his Certified Protection Professional (CPP) 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 responsibility in disputes involving security procedures and threat assessments.
Operations Leader, Technical Engineer, Business Professional
Mark R. Malone, BS is an oil and gas engineering expert specializing in completions, hydraulic fracturing, and stimulation operations. With a career spanning technical engineering, operations leadership, and business management, he brings a strategic growth and capital efficiency framework to his litigation work. His work centers on investigating operational safety practices, assessing engineering project management, and evaluating whether industry standards in drilling and completions were met. Mr. Malone has been retained in numerous expert witness and consulting engagements across the United States, involving complex oil and gas litigation cases. His BS in Agricultural Engineering, along with his extensive industry affiliations, 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 oil and gas operations and engineering practices.
Bicycle Expert
J Lucas Elrath, Bicycle Expert is a bicycle accident reconstruction expert specializing in commercial and personal injury litigation involving bicycles and wheeled vehicles. With a career encompassing bicycle design, manufacturing, and maintenance, he brings a comprehensive understanding of how these elements impact rider safety and accident causation. His work centers on investigating crash dynamics, assessing design and manufacturing defects, and evaluating whether maintenance practices contributed to accidents. Mr. Elrath has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to bicycle design, manufacturing defects, and crash reconstruction. His B.S. in Electrical Engineering, along with certifications such as E-Bike Fundamentals Certification and Certified Bicycle Technician, 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 bicycle accidents and related safety issues.
P.E., R.L.S.
James D. Wamble, P.E., R.L.S. is a civil engineering and land surveying expert specializing in land use planning and real estate development disputes. With a career spanning civil engineering design, land surveying, and land planning, he brings a multidisciplinary framework to litigation work. His work centers on investigating boundary disputes, assessing land use compliance, and evaluating whether engineering standards have been met. Mr. Wamble has been retained in numerous expert witness and consulting engagements across Tennessee, involving cases related to land condemnation, eminent domain, and real estate development. His Bachelor of Science Degree in Civil Engineering, along with his certifications as a Professional Engineer and Registered Land Surveyor, 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 site design, drainage, and zoning issues.
Principal Consultant
Scott M. Drouin, Ph.D. is a toxicology expert specializing in cases involving respiratory diseases related to airborne exposure to environmental substances. With a career encompassing toxicology, immunology, and lung physiology, he brings a multidisciplinary approach to litigation work, particularly in assessing the risk of respiratory illnesses from environmental contaminants. His work centers on investigating exposure to drugs and alcohol, assessing the risk of respiratory diseases from environmental substances, and evaluating whether medical documentation aligns with alleged exposures. Dr. Drouin has been retained in numerous expert witness and consulting engagements across the United States, involving cases of workers' compensation, toxic torts, and environmental exposure. His Doctorate in Microbiology from the University of Alabama at Birmingham, along with his extensive laboratory research experience, 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 toxicological and environmental exposure issues.
Law Enforcement and Security Professional
Clinton Smith is a law enforcement and security expert specializing in police practices and procedures. With a career spanning internal affairs, crisis management, and security operations, he brings a multifaceted perspective to litigation work. His work centers on investigating criminal and background investigations, assessing crisis and risk management, evaluating whether security and safety assessments meet regulatory compliance. Mr. Smith has been retained in numerous expert witness and consulting engagements across California, involving law enforcement practices, security operations, and crisis management. His POST Background Investigator certification, along with his Advanced POST Certificate, 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 police practices and procedures.
Security and Emergency Management Expert
Alan J. Robinson, Certified in Homeland Security Level IV, Certified in Healthcare Compliance is a Security and Emergency Management Expert specializing in security and premises liability litigation. With a career spanning law enforcement, corporate security, and healthcare emergency management, he brings a strategic risk assessment framework to litigation work. His work centers on investigating security negligence, assessing emergency management protocols, and evaluating whether fire safety standards were met. Mr. Robinson has been retained in numerous expert witness and consulting engagements across New Jersey, involving cases related to security management, emergency response, and fire safety in healthcare and corporate environments. His Associate of Science in Public & Social Services, Criminal Justice, along with certifications such as Essentials of Security Risk Assessment, 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 workplace violence, infant abduction, and excessive force.
Expert Witness
Raymond P Gessner, M. Eng, P.E. is a Structural Engineering and Forensic Science expert specializing in hail, wind, and foundation damage litigation. With a career encompassing diverse engineering disciplines, he brings a multifaceted perspective to his litigation work. His work centers on investigating structural failures, assessing damage causation, and evaluating whether industry standards were met. Mr. Gessner has been retained in numerous expert witness and consulting engagements across various regions, involving residential property damage, insurance denial cases, and natural disaster impacts. His Master Engineering degree from Old Dominion University, along with certifications such as Licensed Professional Engineer (P.E.) and HAAG Certified Master Damage Inspector, 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 structural and environmental damage.
President of Ferrantello Surveyors and Land Planners
Frank S. Ferrantello, PLS is a land surveying and civil engineering expert specializing in boundary disputes, accident site mapping, and land use planning. With a career encompassing diverse projects in land surveying, civil engineering, and site development, he brings a multidisciplinary perspective to litigation work. His work centers on investigating boundary discrepancies, assessing site conditions, and evaluating whether professional negligence has occurred. Mr. Ferrantello has been retained in numerous expert witness and consulting engagements across New York, involving cases related to land surveying, civil engineering, and zoning disputes. His education in Civil Engineering/Land Use Planning from Hofstra University, along with his New York State Licensed Land Surveyor 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 standard of care in disputes involving land surveying and civil engineering matters.
Associate Professor
Morris D. Argyle, Ph.D., Professional Engineer is a chemical engineering expert specializing in petroleum refining and chemical process engineering safety. With a career encompassing academic leadership and industrial operations, he brings a robust understanding of process safety management and risk assessment to his litigation work. His work centers on investigating fluid catalytic cracking operations, assessing refinery process safety, and evaluating whether industry standards were met in chemical plant designs. Mr. Argyle has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to petroleum refining, chemical plant safety, and heterogeneous catalysis. His Ph.D. in Chemical Engineering from the University of California at Berkeley, along with his Professional Engineer registration in Texas, 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 chemical process safety and refinery operations.
President
Ken Karston, S.E., P.E. is a structural engineering expert specializing in construction defects and building envelope investigations for water infiltration. With a career spanning design, forensic investigations, and construction administration, he brings a comprehensive framework to litigation work involving structural integrity and compliance. His work centers on investigating construction defects, assessing building conditions, and evaluating whether structural designs meet industry standards. Mr. Karston has been retained in numerous expert witness and consulting engagements across the United States, involving residential, commercial, and historic building cases. His Bachelor of Science in Civil Engineering from the University of Illinois at Chicago, along with his certifications as a Registered Structural Engineer in Illinois, Nevada, and Utah, and as a Registered Professional Engineer in multiple states, 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 structural engineering and construction practices.
FSA, MAAA
Jeremy Starr, FSA, MAAA is an actuarial and insurance expert specializing in life reinsurance and related disputes. With a career spanning leadership roles in reinsurance product development, life insurance securitization, and regulatory advocacy, he brings a strategic and regulatory framework to his litigation work. His work centers on investigating reinsurance contract compliance, assessing premium rate adjustments, and evaluating underwriting authority disputes. Mr. Starr has been retained in numerous expert witness and consulting engagements across the United States, involving cases such as yearly renewable term premium rate increases, reinsurance recapture rights, and tax status of life reinsurance agreements. His Bachelor of Arts in Physics and Mathematics from Binghamton University, along with his FSA and MAAA certifications, 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 life reinsurance coverage issues.
President and Founder
David Hilliard Williams is a wireless and IoT technology expert specializing in product and technology development, implementation, and intellectual property litigation services. With a career spanning telecommunications, geotechnical engineering, and location-based services, he brings a multifaceted perspective to his litigation work. His work centers on investigating GPS and network-based location determination systems, assessing wireless 911 and NG911 technologies, and evaluating IoT data privacy and security. Mr. Williams has been retained in numerous expert witness and consulting engagements across the U.S., involving patent, ITC, and criminal litigation, as well as civil trade secrets and product liability cases. His MBA in Information Systems Management from The University of Texas at Austin, along with his BSEE in Digital System Design from Purdue University, 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 wireless communications and IoT systems.
Certified Public Accountant
Michael Goldman, Certified Public Accountant, Certified Valuation Analyst, Certified Fraud Examiner, Certified in Financial Forensics, Master of Management is a forensic accounting and economic damages expert specializing in litigation support for fraud, insolvency, and business valuation cases. With a career spanning forensic reviews, corporate reorganizations, and bankruptcy advisory, he brings a strategic perspective to analyzing financial discrepancies and assessing economic damages. His work centers on investigating fraudulent activities, assessing economic damages, and evaluating whether financial misstatements have occurred. Mr. Goldman has been retained in numerous expert witness and consulting engagements across the United States, involving cases of fraud, shareholder disputes, and insolvency. His Master of Management in Finance and Accounting from Northwestern University, along with certifications as a Certified Public Accountant, Certified Valuation Analyst, Certified Fraud Examiner, and Certified in Financial Forensics, 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 and responsibility in disputes involving financial fraud and economic damages.
Physician, Clinical Leader, Healthcare Technology Executive
Darin M. Vercillo, MD is an internal medicine and healthcare technology expert specializing in medical legal analysis and expert witness testimony. With a career encompassing clinical leadership, healthcare technology innovation, and hospital governance, he brings a multifaceted perspective to litigation work. His work centers on investigating medical records accuracy, assessing standard of care in hospital settings, and evaluating causation in complex medical cases. Dr. Vercillo has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to cardiac events, sepsis, and hospital billing practices. His Doctor of Medicine from the University of Utah School of Medicine, along with board certification by the American Board of Internal Medicine and ACLS 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 hospitalist care, medical technology integration, and patient management protocols.
Principal Engineer
Cassandra K. Moody, M.S, P.E. is a midstream pipeline engineering expert specializing in integrity management and risk-informed solutions. With a career encompassing midstream operations and integrity engineering, she brings a practical, field-based perspective to her litigation work. Her work centers on investigating pipeline failures, assessing compliance with safety regulations, and evaluating whether operational standards have been met. Ms. Moody has been retained in numerous expert witness and consulting engagements across the United States and Canada, involving cases related to pipeline safety, construction practices, and regulatory compliance. Her Master of Science in Environmental Engineering, along with her certification as a Licensed Professional Engineer in Texas, 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 pipeline integrity and safety.
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