David M. Fortenbaugh

David M. Fortenbaugh, Ph.D.

Senior Staff Consultant

Dr. David Fortenbaugh serves as a consultant and project manager for litigation and research projects related to product liability, premises safety, and accident reconstruction. He specializes in the human factors and biomechanics/injury aspects of accidents. He has extensive experience in multidisciplinary projects involving pedestrians, bicycles, cars, heavy trucks, motorcycles, off-road vehicles, boats, and personal watercraft. Dr. Fortenbaugh has been involved in issues of workplace safety, warnings and instructions, and human motion analysis including occupant kinematics. He has also conducted medical records reviews, surrogate studies, and numerous product evaluations.

His technical investigations at ESi have involved products for medical equipment and devices, sports and fitness equipment, motorcycle and bicycle helmets, and amusement parks. Safety issues related to on-product labels and manual instructions and warnings are regularly examined, as are human factors issues such as conspicuity and nighttime visibility, distracted and fatigued driving, vehicle back-overs, and machine guarding. Dr. Fortenbaugh also analyzes incidents involving slips, trips, and falls, issues related to ADA compliance, and objects falling from a height.

Prior to joining ESi, Dr. Fortenbaugh worked extensively with athletes and medical professionals for over 10 years to improve human performance and reduce injury. His previous research has focused on biomechanical analysis of both basic and sports-specific movements, effectiveness of surgical techniques through cadaver testing, and clinical outcomes following orthopedic surgery. He has presented his research findings at many national and international scientific conferences and has published numerous peer-reviewed journal articles. He has also served as a journal article reviewer and in leadership roles in several professional societies.


  • Changes in Youth Baseball Pitching Biomechanics: A 7-Year Longitudinal Study, American Journal of Sports Medicine, January 2017
  • Long-Term Outcomes after Ulnar Collateral Ligament Reconstruction in Competitive Baseball Players: A Minimum of 10 Years Follow-up, American Journal of Sports Medicine, January 2014
  • Trunk Axial Rotation in Baseball Pitching and Batting, Sports Biomechanics, January 2013
  • Dynamic Ultrasonography: A Cadaveric Model for Evaluating Aseptic Loosening of Total Ankle Athroplasty, Journal of Foot & Ankle Surgery, January 2013
  • Back Squat Comparison of Barefoot and Shoe Conditions, International Journal of Sports Science and Coaching, January 2013
  • Kinematic Changes Using Weightlifting Shoes on Barbell Back Squat, Journal of Strength and Conditioning Research, January 2012
  • The Effect of Pitch Type on Ground Reaction Forces in the Baseball Swing, Sports Biomechanics, January 2011
  • Biomechanical Comparison of Baseball Pitching and Long-Toss: Implications for Training and Rehabilitation, Journal of Orthopaedic and Sports Physical Therapy, January 2011
  • Effects of the Bench Shirt on Sagittal Bar Path, Journal of Strength and Conditioning Research, January 2009
  • Baseball Pitching Biomechanics in Relation to Injury Risk and Performance, Sports Health: A Multidisciplinary Approach, January 2009
  • See CV for further publications

Home Office


4775 Centennial Boulevard Suite 106 Colorado Springs, CO 80919
  • Phone: (719) 535-0400
  • Fax: (719) 535-0402

Project Experience

ESi's expertise spans dozens of industries and specializations organized across several practice groups, each staffed by dozens of in-house experts with the technical knowledge, hands-on expertise, and courtroom experience required to execute projects for and with our clients from start to finish.

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