Dr. Robert G. Marx is an Orthopedic Surgeon at the Hospital for Special Surgery and Professor of Orthopedic Surgery at Weill Medical College of Cornell University. He is Vice Chair of Orthopedic Surgery for faculty development at the Hospital for Special Surgery.

Dr. Marx obtained his BSc at Université de Montréal and his MD at McGill University, also in Montréal, Québec, Canada. He completed his residency in orthopedic surgery at the University of Toronto in Toronto, Ontario, Canada, where he also completed a MSc in Clinical Epidemiology. After his residency he was a fellow for two years at Hospital for Special Surgery in sports medicine, focusing on knee surgery. Dr. Marx has extensive experience in knee surgery, with particular interest in ACL surgery, complex knee ligament reconstruction, and knee replacement. Dr. Marx has published over 300 peer reviewed scientific articles and six books, including three relating to ACL injury and surgery. He is the Head Consulting Orthopedic Surgeon for Ultimate Fighting Championship (UFC), The Juilliard School and a Team Physician for the New York Rangers. Dr. Marx serves on the Executive Board of Directors of the International Society of Arthroscopy, Knee Surgery, and Orthopedic Sports Medicine (ISAKOS) as Second-Vice President and will serve as ISAKOS President for the 2027-2029 term.