Charles S. Mansueto, PhD, is founder and director of the Behavior Therapy Center of Greater Washington, a leading center for the treatment of obsessive-compulsive and related disorders. He has over thirty-five years of experience providing cognitive behavior therapy (CBT) for a broad range of clinical problems. He has written extensively and presented nationally and internationally on obsessive-compulsive disorder (OCD) and related disorders. He is past president and currently serves as a member of the Scientific Advisory Board of The TLC Foundation for Body-Focused Repetitive Behaviors. He is also a member of the Scientific and Clinical Advisory Board of the International OCD Foundation (IOCDF); and of OCD Mid-Atlantic, an IOCDF affiliate. He retired as a tenured professor of psychology after thirty-six years in the University System of Maryland.