Dr. David Greenberg graduated from the University of Western Ontario in 1989 and returned to practice in the house in which he grew up, in downtown Toronto alongside his father, Dr. Joe Greenberg. David is currently on staff at St. Joseph’s Health Centre. There he plays a leadership role in the areas of Family medicine, Obstetrics, and Continuing Medical Education. Dr. Greenberg was the Chief of Family and Community Medicine, and Chief of Emergency Medicine at Doctors Hospital, a community hospital which had taken a leadership role in the industry wide transition to a focus on Ambulatory care. He was also the Chairman of Continuing Medical Education. In addition, Dr. Greenberg has undergone training in peer group facilitation, including the "Premi Problem Based Learning Program", and has acted in this role for a number of pharmaceutical companies on a variety of topics. David is also a member of the Ontario Anti-Infective review panel, a group that is trying to ensure antibiotics are used more appropriately in Ontario, as well as having been involved as a GP advisor in the development of three other National Guideline programs. Dr. Greenberg serves as the current president of the Canadian Society for the Study of the Aging Male (CSSAM).