Andrew Tatarsky is an internationally recognized leader in the treatment of substance misuse and other potentially risky behaviors. He has specialized in the treatment of addiction for 30 years as a counselor, psychologist, program director, trainer, advocate and author. He has devoted his career to developing a comprehensive understanding of the broad spectrum of substance use problems and an integrative harm reduction psychotherapy approach to treating this spectrum. Dr. Tatarsky is Founder and Director of the Center for Optimal Living, where treatment and professional training is based on Integrative Harm Reduction Therapy (IHRP). He is a Clinical Advisor to the Office of Alcoholism and Substance Abuse Services of New York State, Founding board member and President-elect of the Division on Addiction of New York State Psychological Association, Board Member of Moderation Management Network, founding board member of Association for Harm Reduction Therapy and Chairman of Mental Health Professionals in Harm Reduction and Faculty, Advanced Specialization in Family and Couple Therapy, The Postdoctoral Program in Psychotherapy and Psychoanalysis, New York University.