Justice Yves-Marie Morissette graduated from the Collège Sainte-Marie in Montreal before completing a Bachelor of Political Science at the Université du Québec à Montréal and an LL.L. at the Université de Montreal. In 1973, he received a Rhodes Scholarship for Quebec and began a D.Phil. degree in law at the University of Oxford, which he completed four years later.
In 1977, he joined the Quebec Bar and became an Assistant Professor at the Faculty of Law of McGill University. During his academic career, he taught, among other subjects, administrative law, evidence and comparative law, and served as Associate Dean (1987-1989) and Dean of the Faculty (1989-1994). At the time of his appointment to the Court of Appeal of Quebec on November 7, 2002, he was Arnold Wainwright Professor of Civil Law and Director of the Institute of Comparative Law at McGill University.
Prior to his appointment, Justice Morissette had been President of the Quebec Law Teachers' Association, President of the Council of Canadian Law Deans, Vice-President of the Fondation du Barreau du Québec and Chair of the University Appeals Committee at McGill University.
He has also served on several standing and ad hoc committees of the Bar of Quebec, including the Comité de la formation professionnelle, the Comité des équivalences and the Comité de déontologie, and was a member of several professional and academic associations. He has published articles and books in public law, private law and comparative law, which appeared in Canada and abroad, and was a visiting professor, guest lecturer or speaker at universities and conferences in Canada, the United States, France, England, Vietnam and the People's Republic of China.