Dr. Nalliah received his degree in dental surgery at the University of Adelaide, South Australia. He has worked in rural Australia, serving elderly persons in aged-care settings, children in underserved communities, inmates in correctional facilities, and Indigenous Australians. In his career he has served as Director of a pediatric dental project in rural Australia and been a business partner in a private practice in Mt. Barker (Australia).
Dr. Nalliah now serves as the Faculty Head for Castle Society at the Harvard School of Dental Medicine. In 2011 he won a Massachusetts Dental Society award that recognizes dentists who have made a significant contribution to the profession within the first ten years of their career. More recently, Dr. Nalliah was selected to enter the prestigious Leadership Institute of the American Dental Association.