Dr. Gregory is an associate professor at the Indiana University School of Social Work. Dr. Gregory is a clinical social worker with a history of using cognitive-behavioral therapy in the treatment of persons with mood, anxiety, psychotic, and substance use disorders. His work places an emphasis on the translation of research into clinical social work practice. Dr. Gregory's research agenda focuses on the evaluation and implementation of cognitive-behavior therapy in the treatment of opioid use and other drug disorders, affective disorders, and in persons of African descent. Dr. Gregory's methods include psychometrics, systematic reviews, meta-analyses, and clinical trials.