Julian is the inaugural Chair of Intellectual Disability Mental Health at UNSW Sydney. He also heads the Department of Developmental Disability Neuropsychiatry within the School of Psychiatry at UNSW. He is a clinician and academic with a background in neuropsychiatry.

Julian leads national initiatives in health care for people with intellectual and developmental disability. He works with Commonwealth and State Government Departments to improve health services for people with an intellectual or developmental disability. He sits on multiple Commonwealth and State Government Committees and provides advice to regulatory bodies in his area of expertise. Julian also develops and delivers courses in mental health and intellectual disability.

Julian is involved in diverse research programs that examine the health inequalities experienced by people with intellectual or developmental disability and design solutions to the issues arising. He is passionate about inclusive research practices and enjoys rich interdisciplinary collaborations.