Dr. Spencer is an Associate Professor of Psychiatry at Harvard Medical School and the Assistant Chief of the Pediatric Psychopharmacology Research Program at Massachusetts General Hospital. Before joining Massachusetts General Hospital, Dr Spencer was the Head of the Clinical Team, Child and Adolescent Division, of the Massachusetts Department of Mental Health. His research and clinical interests have focused on the effectiveness and safety of standard and novel pharmacologic treatments of Attention-Deficit/ Hyperactivity Disorder (ADHD) throughout the life-cycle.

Dr. Spencer has been a co-investigator in Dr. Biederman's longitudinal and family-genetic studies of ADHD. In addition, Dr. Spencer is the Principal Investigator in an NIMH funded project that examines the translation of improvement in ADHD symptoms into increased functional capacities and quality of life in adults with ADHD. Dr. Spencer has published over 90 scientific articles and over 30 book chapters and is on the Editorial Board of a number of Journals.