He has a specialty in the assessment and treatment of challenging behavior in adults with intellectual and developmental disabilities. He has a passion for successfully integrating the individuals he works with into environments that enrich their lives through behavior therapy and caregiver training.

Gregory has practiced at the Kennedy Krieger Institute/Johns Hopkins University’s Neurobehavioral outpatient Unit and Schools, the University of Iowa, Virginia Institute of Autism’s School and Adult Services, and Seattle Children’s Hospital’s Alyssa Burnett Adult Life Center.