Previously, Medlock served as Chief of Neurosurgery at North Shore Medical Center and Director of Pediatric Neurosurgery at Georgetown University Medical Center in Washington, D.C. Medlock is the President of the Massachusetts Association of Neurosurgeons and is a member of an Opioid Therapy and Physician Communication task force through the Massachusetts Medical Society. He received his M.D. from the University of Florida College of Medicine in 1984 and his bachelor degree from the University of Notre Dame in 1979.