Dr. Rustom Sethna is the Chief of Psychiatry at Markham Stouffville Hospital, where services are provided to individuals suffering from severe persistent Major Mental illnesses across the lifespan.    He is a Fellow of The Royal College of Physicians and Surgeons of Canada and has appointments at Queens and McMaster Universities, and The University of Toronto where he is an Assistant Professor and Lecturer respectively.

He has an interest in health delivery models in Mental Health in addition to his administrative role, and provides emergency in-Patient and out-Patient clinical and diagnostic services.

He has subspecialty interests in Neuropsychiatry and Geriatric Psychiatry.

He sits on the Boards of the Markham Stouffville Hospital Foundation, and The Association of General Hospital Psychiatric Services.