Dr. Maloney is currently Professor and Chair of the Department of Orthopaedic Surgery, Stanford University School of Medicine where he oversees clinical and research programs in areas including general and pediatric orthopaedics, spinal surgery, arthroscopy and sports medicine. A Stanford alumnus, he returned from the Washington University School of Medicine in St. Louis, where he also served as Chief of Orthopaedic Surgery at Barnes-Jewish Hospital.

His clinical and research efforts concentrate on joint replacement surgery and he is internationally recognized for his work on the skeletal response to biomaterials used in total joint replacement. He has received a number of awards, including two Hip Society Research Awards and the American-British-Canadian Traveling Fellowship of the American Orthopaedic Association. He is the author of more than 175 peer-reviewed articles.

Dr. Maloney is active in numerous professional societies. He is currently First Vice-President of the American Association of Orthopaedic Surgeons (AAOS) and has served on a number of AAOS committees, including the Council on Education. Previously, he was chair of the American Joint Replacement Registry Board of Directors (AJRR), and on the board of directors for the Knee Society, the Hip Society, the Western Orthopaedic Association, and the American Association of Hip and Knee Surgeons (AAHKS). He is a past president of the Hip Society.