He has served as a consultant on suicide prevention for the U.S. Department of Defense, the Indian Health Service, and the York State Office of Mental Health. He was a member of the Surgeon General’s Advisory Task Force on Suicide Prevention. He is a past president of the American Foundation for Suicide Prevention and of the Society for Research in Child and Adolescent Psychopathology. In addition to these research studies, he has contributed to the debate about the relationship between SSRI antidepressants and suicidal behavior for the American Academy of Child and Adolescent Psychiatry, the American Psychiatric Association, and both the American College of Neuropsychopharmacology and the European College of Neuropsychopharmacology. He has been married and divorced twice. His first wife was the caterer Serena Bass, by whom he has two sons. His second wife, by whom he has a daughter and a son, was "Vogue" editor in chief Anna Wintour.