The recipient of NIMH and IES grant awards, his clinical and research interests include youth diagnostic and behavioral assessment, child anxiety disorders, treatment integrity research, provider training and supervision, and the dissemination and implementation of evidence-based practices in community settings. He is the author or co-author of numerous scientific articles, book chapters and books. His books include Child Anxiety Disorders: A Family-Based Treatment Manual for Practitioners (Norton) and Diagnostic and Behavioral Assessment in Children and Adolescents: A Clinical Guide (Guilford). He is currently an associate editor for the journal Behavior Therapy. He has served on local, national and international committees focused on evidence-based practice for children and adolescents.