Gary Geissler has been the Clinical Director of Rehabilitation for Harvard's sports medicine team since 1991.

Geissler provides clinical consultations and treatments for student athletes with complicated or unresolved orthopedic dysfunction to include implementing and directing appropriate treatment plans. His primary sports assignments include Crimson football, M & W cross country and M&W track & field teams. Geissler also serves as the Continuing Education Coordinator the sports medicine group, outlining and scheduling lectures, workshops, in-services and journal club.

Geissler has a lengthy list of affiliations with world-class athletes, both at Harvard and on the national and international circuits. He has been the head athletic trainer and sports physical therapist for the U.S. national track and field team at the World Championships and was a member of the athletic training and physical therapy staff or the U.S. team at the 1996 Olympic Games in Atlanta. He was a volunteer athletic trainer during the 1994 FIFA World Cup and has worked as an athletic trainer at a number of high-level ice hockey, basketball and wrestling events as well.

Before coming to Harvard, Geissler served as director of physical therapy at SportsMedicine Boston and as head athletic trainer at Hellenic College. He also spent three years as an athletic trainer at Boston University.

Geissler is a 1981 graduate of Boston University where he also obtained a Master's in Physical Therapy in 1986. He has recently been awarded his Doctorate in Physical Therapy from The Massachusetts General Hospital Institute of Health Professions in Boston.

Geissler is an Assistant Professor at the MGH IHP where he teaches Sports Physical Therapy and has served as a Clinical Lecturer and Laboratory Instructor for Boston University's Sargent College of Rehabilitation Sciences.