David M. Rosenthal has been a family therapist, faculty member and executive director of a harm reduction center. He has given academic presentations all over the world and has written a number of professional publications and books. David received his Ph.D. in Counselor Education from the State University of New York at Buffalo. He is currently an Associate Professor and the Director of Management Programs in Health Policy and Management in the Mailman School of Public Health, and a behavioral faculty member in the Center for Family and Community Medicine, Columbia University Medical Center. Over the past years he has also been a board member and president of a number of non-profit boards.