John Lloyd, PhD, CPE is a biomechanics expert and has served as an expert witness for 25+ years, providing nationwide expert testimony in the fields of biomechanicsergonomics, human factors,  auto / motorcycle accident reconstruction and slips trips and falls.

Biomechanics Expert

Dr. Lloyd has been court qualified to provide biomechanics analysis of various incidents, including:


Dr. Lloyd earned a Ph.D. in Human Factors / Ergonomics with specialization in biomechanics from Loughborough University in England in 2002. He has conducted research in biomechanics and ergonomics for over 25 years, and is board certified through the Board of Certification in Professional Ergonomics.

Expert Witness Experience

To date, Dr. Lloyd has provided expert witness Deposition and Trial Testimony in more than 80 civil and criminal cases involving complex motorcycle accidents, automobile accidents, trucking accidentshelmet protection as well as slips, trips and falls. His expertise in biomechanics, human factors and accident reconstruction has been recognized by courts in  Arizona, Colorado, Florida, Georgia, North Carolina, Ohio, Oregon, Texas and Great Britain. The biomechanical analysis methods that Dr. Lloyd utilizes are published in peer-reviewed scientific journals and have survived Frye and Daubert challenges.


Dr. Lloyd was employed by the VA Hospital in Tampa, FL as a senior researcher for 20 years, culminating in the position of Director of the Traumatic Brain Injury Laboratory. In addition he has held a courtesy faculty appointment as Assistant Professor in the University of South Florida College of Engineering for 15 years and is currently the Research Director of BRAINS, Inc.

To date, Dr. Lloyd’s work has been published in six book chapters and 31 peer-reviewed journals, as well as  presented at more than 100 national and international conferences (see curriculum vitae).

Accident Reconstruction Expert

biomechanics expert motorcycle - Dr. John LloydDr. Lloyd’s passion is motorcycling, which, along with automobile accidents, is a leading cause of traumatic brain injuries in the United States. Dr. Lloyd has obtained certification through the Institute for Police Technology and Management (ITPM) on Motorcycle Crash Investigation, as well as certification in Reconstruction and Analysis of Motorcycle Accidents through the Society for Automotive Engineering (SAE).

Research Interests

Dr. Lloyd’s ultimate goal as a biomechanics expert is to develop a new generation of advanced helmets using intelligent materials to provide protection against both blunt force trauma to the head as well as traumatic brain injuries. His research has lead to the development of Impact Absorbing Composite Materials, a patent on which has been filed with the United States Patents and Trademarks Office (USPTO). The efficacy of this design was demonstrated during the NI Week keynote presentation in 2014, which can be viewed on YouTube.  Consequently Dr. Lloyd is currently exploring the utility of this patent with several helmet industry manufacturers to provide advanced head and brain injury protection to motorcyclists, football players and participants in many other sports that require helmets.

Please call Dr. Lloyd at 813-624-8986 or email to discuss how he can be of help to you with your case.

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