Dr. Harbin is a psychiatrist with over 40 years of experience in the behavioral health field. He served as the chairman of Greenspring Health Services and Magellan Health Services—which managed mental health and substance abuse benefits of 70 million Americans. He has also provided health care consulting services to organizations including the AARP, the American Psychiatric Association, and Mental Health America. Since 2004, he's served as an adviser to the Kennedy Forum (an advocacy group founded by Patrick Kennedy to push for reforms in the US behavioral system).