Dr. Zajac is director of speech-language pathology and the pressure-flow laboratory in the Adams School of Dentistry Craniofacial Center. Zajac specializes in the assessment and treatment of children and adults with craniofacial anomalies. He has over 25 years experience with this population. He has written many book chapters and/or research articles on normal and disordered speech production. He is an ASHA Fellow and past associate editor for the Journal of Speech Language and Hearing Research.