Professor Thomas H. Ollendick, Ph.D., is University Distinguished Professor in Clinical Psychology and Director of the Child Study Center at Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA. He is the Past-President of the Association for the Advancement of Behavior Therapy (ABCT, 1995), founding member of the World Congress Committee (WCC, Copenhagen, 1995), former International Associates Chair of ABCT, and past editor of Behavior Therapy. He received the Career/Lifetime Achievement Award from ABCT in 2013 and the Lifetime Achievement Award for Scientific Contributions from the Society of Clinical Psychology (APA) in 2017. He is the author of 350+ research publications, 100+ book chapters, and 35 books. He is the past editor of the Journal of Clinical Child and Adolescent Psychology and Behavior Therapy, as well as founding and current Co-Editor of Clinical Child and Family Psychology Review. The recipient of several NIMH grant awards, his clinical and research interests range from the study of diverse forms of child psychopathology to the assessment, treatment, and prevention of these child disorders from a social learning/social cognitive theory perspective.