 From 1977 to 1995, Létourneau worked in the Department of Justice in Quebec.After serving five years as Vice-President, Létourneau was appointed President of the Law Reform Commission of Canada on July 5, 1990.In 1991, he was appointed Queen's Counsel and on May 13, 1992, Judge of the Federal Court of Canada, Appeal Division and "ex officio" member of the Trial Division, and Judge of the Court Martial Appeal Court of Canada on May 13, 1992.