Roger D. Weiss, M.D., is Professor of Psychiatry at Harvard Medical School and Chief of the Division of Alcohol, Drugs, and Addiction at McLean Hospital in Belmont, Massachusetts. He has been Principal Investigator on numerous NIDA and NIAAA grants, and has developed Integrated Group Therapy, an evidence-based treatment for patients with co-occurring bipolar disorder and substance use disorders. Dr. Weiss led a multi-site national study of the treatment of prescription opioid dependence, as part of the NIDA Clinical Trials Network, and is currently a Lead Investigator on the multi-site Retention, Duration, Discontinuation (RDD) study, examining optimal treatments for opioid use disorder.

Dr. Weiss has authored over 400 articles and book chapters as well as 6 books, is a member of numerous journal editorial boards, and has participated in prominent national committees, including serving as Vice Chair of the American Psychiatric Association Task Force on Practice Guidelines for Patients with Substance Use Disorders. He also has served as substance use consultant to the Boston Red Sox. He was named a Member of Honor by the Spanish Society for Dual Disorders in 2011, and has received numerous other awards, including the H. David Archibald Award for Outstanding Research and/or Practice in the Addictions from The Centre for Addiction and Mental Health in Toronto (2007), the Jack H. Mendelson Research Award from McLean Hospital (2012), the Dan Anderson Research Award from the Hazelden Foundation (2012), and the Anne M. Cataldo Excellence in Mentoring Award from McLean Hospital (2014).