Andrew Tatarsky, PhD is an internationally recognized leader in the treatment of problematic substance use and other potentially risky behaviors. He has specialized in the field of substance use treatment for 35 years working as a counselor, psychologist, program director, trainer, advocate and author. He has devoted his career to developing a comprehensive psychobiosocial understanding of the broad spectrum of substance use problems and an integrative harm reduction psychotherapy approach to treating this spectrum. This treatment is described in his book, Harm Reduction Psychotherapy: A New Treatment for Drug and Alcohol Problems, and several professional papers that extend the approach. Dr. Tatarsky is Founder and Director of the Center for Optimal Living in NYC, a treatment and professional training center based on Integrative Harm Reduction Therapy (IHRP) for the spectrum of substance misuse and other high-risk behaviors. He earned his doctorate in clinical psychology from the City University of New York and is a graduate of New York University’s Postdoctoral Program in Psychotherapy and Psychoanalysis. He is a member of the medical and clinical advisory panels to the Office of Alcoholism and Substance Abuse Services of New York State. Dr. Tatarsky is a founding member and twice past-president of the Division on Addiction of New York State Psychological Association.