On his return to Canada in 1953, he became an assistant professor teaching Canadian constitutional law at the Université de Montréal. He taught there for twenty years, including serving as Dean of the Faculty of Law from 1968 to 1970.[1] He had a reputation as a reflective and meticulous scholar and a wise and caring teacher.[3] One of his colleagues on the Faculty of Law was Pierre Trudeau, later the federal Minister of Justice and then Prime Minister of Canada.