Dr. Clark is the director and principal investigator of the Pittsburgh Adolescent Alcohol Research Center, funded by NIAAA, and co-principal investigator of the Center for Education and Drug Abuse Research, funded by NIDA. He is an associate professor of psychiatry at the University of Pittsburgh. Dr. Clark was trained in clinical psychology at UCLA (Ph.D. 1980), in medicine at Harvard (M.D. 1985) and in psychiatry at Stanford University (psychiatry residency 1989). Dr. Clark is supported by an NIAAA Independent Scientist Award. His program of research applies an integrated array of scientific methods to determining the causal relationships among substance use disorders and other mental disorders during adolescence. These methods include advanced statistical modeling techniques for longitudinal data, molecular genetics, neuroimaging, and treatment trials. Dr. Clark’s work has been recognized by awards from the American Psychiatric Association, the American College of Psychiatrists, the American Psychological Association, and the Society of Biological Psychiatry.