Dr. Kreiswirth earned his PhD in Athletic Training from Rocky Mountain University of Health Professions in Provo, Utah. His research focus has been The Epidemiology of Musculoskeletal Injuries among Brazilian Jiu Jitsu Fighters, in addition to, Instrument Assisted Soft Tissue Mobilization.

He is the owner of Kreiswirth Sports Medicine Systems, LLC, which oversees medical handling for Brazilian Jiu Jitsu Federations.
In the past, Ethan has been a Professor and Program Director for Rocky Mountain University and Concordia University, as well as California State University Dominguez Hills.
Dr. K has worked with many Olympic, Pro, College and high school sport teams as a Certified Athletic Trainer since 1996.
He has been a contributing author in peer-reviewed journals’ such as International Journal of Athletic Therapy and Training, Journal of Athletic Training, Athletic Training and Sports Health Care, International Journal of Sports Physical Therapy, and Journal of the Canadian Chiropractic Association.