Dr. O'Donnell is a Professor of Clinical Orthopaedic Surgery at the University of California, San Francisco. He served as Chief of the Orthopaedic Oncology Service in the UCSF Department of Orthopaedic Surgery from 2002 through 2019. He is Director of the Sarcoma Program at the UCSF Helen Diller Family Comprehensive Cancer Center. Dr. O'Donnell is Founder of the Orthopaedic Surgical Osseointegration Society (OSOS). He is Director of both the UCSF Musculoskeletal Research Consortium (METRiCS) and the UCSF international Center for Osseointegration Research, Education, and Surgery (iCORES), and he is an Extramural Member of the Steering Committee for the Department of Defense Osseointegration Program. Dr. O'Donnell is proud to serve under the auspices of the American Red Cross at the Walter Reed National Military Medical Center. He has also been appointed as Visiting Professor of Surgery at the Harvard Medical School.