Witnessly
Expert Witness Directory

Find the Right Expert for Every Case

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

Showing 253–270 of 3,373 experts

Otolaryngology

Richard Laurence Nass, M.D., F.A.C.S.

Board Certified Otolaryngologist

East Hampton, NY46 years+ yrs★ 8.9

Richard Laurence Nass, M.D., F.A.C.S. is an Otolaryngology expert specializing in endoscopic sinus surgery and related litigation matters. With a career encompassing diverse roles in surgical practice, academic appointments, and medical device consulting, he brings a multifaceted perspective to his litigation work. His work centers on investigating surgical outcomes, assessing medical device efficacy, and evaluating whether standard of care deviations occurred. Dr. Nass has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to otolaryngology, sinus surgery, and medical device patents. His Medical Doctor degree from New York University School of Medicine, along with his certification from the American Board of Otolaryngology, 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 hearing loss, sinus infections, and noise exposure.

Endoscopic Sinus Surgery
Pipeline Integrity Management

Derek B. Gilboe, PE

Derek B. Gilboe, PE

Managing Director

Spring, TX★ 8.9

Derek B. Gilboe, PE is a pipeline integrity management expert specializing in asset integrity assessment and risk-based inspection. With a career encompassing diverse roles in engineering and management across the energy sector, he brings a comprehensive framework for evaluating technical compliance and operational safety in litigation contexts. His work centers on investigating pipeline failures, assessing asset integrity management systems, and evaluating whether industry standards have been met. Mr. Gilboe has been retained in numerous expert witness and consulting engagements across North America, involving cases related to gas utility management, pipeline manufacturing quality control, and welding safety. His Bachelor of Science in Metallurgical Engineering, along with certifications such as Certified Welding 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 pipeline safety and integrity management.

Asset Integrity AssessmentRisk-Based InspectionCorrosion Engineering+13
Traffic Engineering

Daren E. Marceau, P.E.

President, Forensic Traffic Specialists, PLLC

Cary, NC37 years+ yrs★ 8.9

Daren E. Marceau, P.E. is a traffic crash reconstruction expert specializing in traffic control devices, roadway design, and crashes involving pedestrians, bicycles, and motorcycles. With a career encompassing law enforcement, engineering design, and forensic analysis, he brings a multifaceted perspective to litigation work. His work centers on investigating traffic crashes, assessing roadway safety, and evaluating whether traffic control devices contributed to incidents. Mr. Marceau has been retained in numerous expert witness and consulting engagements across the United States, involving traffic crash reconstruction and roadway safety cases. His Master of Science in Civil Engineering, along with certifications such as Certified Traffic Signal Technician (II) and Traffic Signal 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 traffic control devices and roadway design.

TransportationTraffic crash reconstructionTraffic control devices+3
pilot

Artemas Keitt Darby, III

Aviation Consultant

Peachtree City, GA54 years+ yrs★ 8.9

Artemas Keitt Darby, III is an aviation consultant specializing in pilot career counseling and aviation industry litigation. With a career encompassing military and commercial aviation, he brings a multifaceted perspective to his litigation work. His work centers on investigating pilot career earnings, assessing pilot training standards, and evaluating whether pilot selection processes meet industry requirements. Mr. Darby has been retained in numerous expert witness and consulting engagements across the United States, involving airline pilot career value, pilot wrongful termination, and pilot injury cases. His B.S. Degree in Aeronautical Studies, along with certifications such as Airline Transport Pilot and type ratings for multiple aircraft, 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 pilot career delays and aviation industry standards.

airline pilotmilitary pilotcorporate pilot+22
Forensic Psychological Evaluations

Elliott B. Rosenbaum

Board Certified Clinical Psychologist

Jacksonville, FL22 years+ yrs★ 8.9

Elliott B. Rosenbaum, Psy.D., ABPP is a board-certified clinical psychologist expert specializing in forensic psychological evaluations. With a career encompassing military mental health services, private practice, and crisis counseling, he brings a nuanced understanding of psychological assessment and intervention to his litigation work. His work centers on conducting forensic psychological evaluations, assessing fitness for duty, and evaluating emotional trauma in legal contexts. Dr. Rosenbaum has been retained in numerous expert witness and consulting engagements across Florida, involving cases related to military mental health, emotional distress, and forensic psychology. His Doctor of Psychology (Psy.D.) in Psychology, along with his Diplomate status with the American Board of Professional Psychology, reinforce his ability to deliver objective, defensible analyses. He is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of psychological causation in disputes involving emotional trauma and fitness for duty.

Psychotherapy
Pharmacist

Austin De La Cruz

Pharm.D., BCPP

Houston, TX9 years+ yrs★ 8.9

Austin De La Cruz, Pharm.D., BCPP is a psychiatric pharmacy expert specializing in psychopharmacology and medication management in mental health settings. With a career encompassing clinical pharmacy practice, academic instruction, and specialized psychiatric pharmacy roles, he brings a nuanced understanding of medication-related issues in psychiatric care to his litigation work. His work centers on investigating medication errors, assessing safe prescribing practices, and evaluating whether drug interactions contributed to adverse outcomes. Mr. De La Cruz has been retained in numerous expert witness and consulting engagements across Texas, involving cases related to psychiatric medication management, substance use disorders, and polypharmacy. His Doctor of Pharmacy degree, along with his Board Certified Psychiatric Pharmacist 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 psychiatric medication practices.

PsychiatryPharmacy
Premises Liability

Amy L. Natoli, CPM®, RPA®

Property Management Expert

Crofton, MD20+ years+ yrs★ 8.9

Amy L. Natoli, CPM®, RPA® is a property management expert specializing in premises liability and real estate litigation. With a career spanning commercial real estate management, risk management, and lease administration, she brings a comprehensive framework to her litigation work. Her work centers on investigating property management practices, assessing compliance with industry standards, and evaluating whether risk management protocols were properly implemented. Ms. Natoli has been retained in numerous expert witness and consulting engagements across the United States, involving commercial real estate properties and premises liability cases. Her Bachelor of Arts in Political Science, along with certifications as a Certified Property Manager (CPM®) and Real Property Administrator (RPA®), 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 property management and standards of care.

Real Estate
Real Estate

Laura A. Cantrell

CPM®

Anchorage, Alaska41 years+ yrs★ 8.9

Laura A. Cantrell, CPM® is a real estate and property management expert specializing in landlord-tenant disputes and premise liability. With a career spanning property management operations, leasing and sales, and risk management, she brings a comprehensive operational framework to litigation work. Her work centers on investigating maintenance and inspection protocols, assessing standards of care in property management, and evaluating whether security and safety measures meet industry standards. Ms. Cantrell has been retained in numerous expert witness and consulting engagements across Alaska and Washington, involving residential, commercial, and HOA property types. Her Certified Property Manager (CPM®) designation, along with her Accredited Buyers Representative (ABR®) and Graduate of Realtors Institute (GRI®) certifications, 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 property management and real estate operations.

Property Management
Property & Asset Management

Scott T. Bennett

Property Management Executive | CPM® Certified Candidate

Keller, Texas34 years+ yrs★ 8.9

Scott T. Bennett, CPM® Certified Candidate is a property management and safety standards expert specializing in premises liability and operational negligence litigation. With a career spanning multifamily, condominium, HOA, and mixed-use property management, he brings a comprehensive understanding of risk management and safety protocols to his litigation work. His work centers on investigating safety failures, assessing compliance with property safety standards, and evaluating whether operational negligence has occurred. Mr. Bennett has been retained in numerous expert witness and consulting engagements across multiple states, involving premises liability, landlord-tenant disputes, and property management cases. His Bachelor of Business Administration in Finance, along with certifications such as CPM and NAAEI CAPS, 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 property management and safety compliance.

Risk & Safety ManagementStandard of CareLitigation Support+2
Fleet Management

Leslie (Les) A. Smart

Expert Witness & Fleet Consultant

Bixby, OK53 years+ yrs★ 8.9

Leslie (Les) A. Smart is a fleet management expert specializing in litigation involving fleet operations, risk management, and safety compliance. With a career spanning fleet operations management, logistics, and safety protocol development, he brings a comprehensive framework to litigation work, focusing on operational efficiency and regulatory adherence. His work centers on investigating fleet safety incidents, assessing compliance with industry standards, and evaluating whether operational deviations contributed to accidents. Mr. Smart has been retained in numerous expert witness and consulting engagements across the United States, involving cases in the transportation, logistics, and fleet management industries. His BS in Business from Concordia University, along with his Class B Commercial Driver’s 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 causation and responsibility in disputes involving fleet safety and operational compliance.

Risk ManagementLogisticsSafety
Education & Schools

Vanessa C. Beauchaine, Ed.D.

Special Education Teacher and Administrator

Mashpee, MA29 years+ yrs★ 8.9

Vanessa C. Beauchaine, Ed.D. is an Education & Schools expert specializing in student safety and school administration litigation. With a career encompassing roles as a special education teacher, principal, and assistant superintendent, she brings a multifaceted perspective to her litigation work. Her work centers on investigating incidents of child abuse and neglect, assessing compliance with Title IX and school safety protocols, and evaluating whether negligent supervision or hiring practices contributed to student harm. Ms. Beauchaine has been retained in numerous expert witness and consulting engagements across Massachusetts, involving cases of child safety, wrongful death, and negligent supervision in educational settings. Her Doctor of Education in Educational Administration from Boston College, along with certifications such as Special Education Administrator and Principal/Assistant Principal, 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 student safety and school administration.

School SafetyStudent Safety
Software Engineering

Mehdi Tarrit Mirakhorli, Ph.D.

Director of Software Assurance Laboratory, Associate Professor

Hermosa Beach, CA19 years+ yrs★ 8.9

Mehdi Tarrit Mirakhorli, Ph.D. is a Software Engineering and Cybersecurity expert specializing in software security and vulnerability management litigation. With a career spanning software design, cybersecurity, and artificial intelligence, he brings a multidisciplinary perspective to his litigation work. His work centers on investigating software vulnerabilities, assessing cybersecurity protocols, and evaluating whether software design meets industry standards. Mr. Mirakhorli has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to software engineering, cybersecurity, and intellectual property. His Ph.D. in Computer Science, along with his extensive experience in software engineering and cybersecurity, 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 software security and design.

Software DesignCybersecuritySoftware Security+6
Hotel & Restaurant

John M. Keeling

Principal

Houston, TX30+ years+ yrs★ 8.9

John M. Keeling, CRE, MAI, CHIA is a hotel and real estate appraisal expert specializing in asset management, franchise and management agreement negotiations, and economic impact assessments. With a career spanning hotel management, consulting, and development, he brings a multifaceted perspective to litigation work involving complex real estate projects. His work centers on investigating hotel valuation, assessing financial structuring of real estate projects, and evaluating whether management agreements align with industry standards. Mr. Keeling has been retained in numerous expert witness and consulting engagements across the United States, involving hotel appraisals, workouts of troubled hospitality assets, and hotel acquisition and financing. His MBA in Hotel Restaurant & Institutional Management, along with certifications such as Certified Hotel Industry Analyst and Texas Certified General Real Estate Appraiser, 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 hotel asset management and financial structuring.

Real Estate AppraiserHotel appraisalsWorkouts and repositioning of troubled hospitality assets+10
Pharmaceutical Research

David Alan Kitzenberg

Life Sciences and Medical Consultant

Aurora, CO17 years+ yrs★ 8.9

David Alan Kitzenberg, M.D., Ph.D. is a pharmaceutical research and infectious diseases expert specializing in the development of novel antibiotic adjuvants and strategies to combat antibiotic resistance. With a career encompassing biotechnology innovation, business strategy, and organizational leadership, he brings a cross-disciplinary perspective to litigation work. His work centers on investigating bacterial resistance mechanisms, assessing the efficacy of pharmaceutical interventions, and evaluating the impact of scientific advancements on treatment outcomes. Mr. Kitzenberg has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to pharmaceutical research, infectious diseases, and biotechnology startups. His Ph.D. in Molecular Biology, along with his M.D., 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 bacterial infections and pharmaceutical efficacy.

Infectious Diseases
Toxicology

Edward U. Maduh, Ph.D.

Board licensed Clinical pharmacist & toxicologist

Washington, DC20+ years+ yrs★ 8.9

Philip J. Cross, Ph.D. is an economics and statistics expert specializing in litigation consulting. With a career encompassing academia, government, and consulting, he brings a multifaceted analytical framework to his litigation work. His work centers on investigating economic damages, assessing antitrust claims, and evaluating statistical methodologies. Dr. Cross has been retained in numerous expert witness and consulting engagements across the United States, involving antitrust, class action, and breach of contract cases. His Ph.D. in Economics from the University of Wisconsin, along with his extensive experience in statistical analysis, 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 complex economic and statistical issues.

Pharmaceutical ResearchPharmacologyClinical Pharmacy+3
Education & Schools

Anthony Mann, D.Ed.

Superintendent of Schools

West Linn, Oregon34 years+ yrs★ 8.9

Anthony Mann, D.Ed. is an Education & Schools expert specializing in evaluating professional standards of care in K-12 settings. With a career spanning roles from teacher to superintendent, he brings a comprehensive framework for assessing school operations and educator conduct. His work centers on investigating educator misconduct, assessing school safety and student well-being, and evaluating whether human resources practices align with educational standards. Mr. Mann has been retained in numerous expert witness and consulting engagements across the United States, involving cases related to school safety, educator misconduct, and student success initiatives. His Doctor of Educational Leadership from the University of Oregon, along with certifications such as the Certified Advancement Via Individual Determination (AVID) District Director, 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 educator conduct and school administration.

School SafetySchool Safety & Student Well-beingEducator Misconduct+3
Medical Devices

Denise Holliday

Medical Device, Regulatory Compliance, and Risk Management Expert

St. Augustine, FL20+ years+ yrs★ 8.9

Denise Holliday, Regulatory Affairs Certification RAC-DEVICES, ISO 13485:2016 Lead Auditor Certification, ISO 9001:2015 Lead Auditor Certification, Certified Quality Auditor Certification, Certified Quality Engineer Certification, Six Sigma Green Belt is a medical device regulatory compliance and risk management expert specializing in litigation support for medical technology businesses, healthcare organizations, and startups. With a career spanning quality management systems, international regulatory compliance, and medical device risk management, she brings a strategic framework to her litigation work. Her work centers on conducting ISO certification audits, spearheading quality management system implementations, and managing regulatory assessments. Ms. Holliday has been retained in numerous expert witness and consulting engagements across the United States, involving medical device manufacturing, compliance, and litigation support. Her Master of Science in Regulatory Science from The Johns Hopkins University, along with her certifications, reinforce her ability to deliver objective, defensible analyses. She is regularly engaged by both plaintiff and defense counsel to provide clear, independent determinations of regulatory compliance and risk management in disputes involving medical devices.

Biomedical EngineeringUS FDA 21 CFRHealth Canada SOR/98-282+16
Structural Engineering

Scott Harvey-Lewis

President / Owner

Palm Beach Gardens, FL18 years+ yrs★ 8.9

Scott Harvey-Lewis, PE is a structural engineering expert specializing in forensic investigations of construction defects and code compliance. With a career spanning structural design, construction administration, and forensic analysis, he brings a comprehensive framework to litigation work involving complex structural failures. His work centers on investigating structural failures, assessing building construction defects, and evaluating whether code compliance has been met. Mr. Harvey-Lewis has been retained in numerous expert witness and consulting engagements across Florida, involving cases related to commercial and residential structures, telecommunication and educational facilities, and industrial plants. His Master of Engineering in Civil Engineering from the University of Florida, along with certifications such as LEED ACCREDITED Professional and Level 1 Unbonded Pt Repair, 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 integrity and construction standards.

Construction DefectsForensic EngineeringBuilding Envelope Systems+1
Talk to us about your case
Find the right expert with greater clarity, confidence, and transparency.
© 2026 Witnessly. All rights reserved.