Dr. Callahan oversees the Developmental Disorder Clinic through LSUHSC’s assessment clinic, supervises trainees conducting assessments, and routinely presents on the assessment of pervasive developmental disorders and handling challenging childhood behavior problems. She was an Irving B. Harris Foundation Fellow and specializes in working with families with very young children (0-5) with and without developmental disabilities. She is the Mental Wellness Coordinator for the Orleans Parish Head Start Program and the child psychologist for the Child Development Center on the Naval Air Station Joint Reserve Base in Belle Chasse, Louisiana.