Dr Ghadirian is a psychiatrist with extensive experience in substance abuse and an Emeritus Physician at the McGill University Health Centre in Montreal. He is recognised as an international authority and has been invited to speak to professional conferences about this subject at the United Nations. As author, educator and researcher, he has published extensively on psychosocial and spiritual issues and spoken at many universities and public events around the world. His current interest is the exploration of the interrelationship between religion and science in the advancement of civilisation.