Fred Penzel, Ph.D. is the Executive Director of Western Suffolk Psychological Services, in Huntington, New York. He sits on the Science Advisory Board of both the Trichotillomania Learning Center and the Obsessive-Compulsive Foundation and is a longtime contributor to the newsletters of both organizations. The author of the highly successful handbook Obsessive-Compulsive Disorders, Dr. Penzel lectures on trichotillomania and conducts numerous workshops both nationally and internationally and he has appeared on NBC's Dateline in a segment about this illness.