Dr. O’Neil graduated from Boston College magna cum laude and Georgetown University School of Medicine. He is certified by the American Board of Internal Medicine in both internal medicine and geriatric medicine. He was formerly an Assistant Professor of Medicine at the University of Massachusetts Medical Center and is currently a Clinical Professor in the Department of Aging Studies at the University of South Florida. Dr. O’Neil is a Fellow of the American College of Physicians (FACP) and a Certified Medical Director (CMD) of the American Medical Directors Association. He formerly served as the Chief Medical Officer of Brookdale Senior Living from 2006 to 2016 and at Ascension Senior Living from 2016-2018.