Court of Appeal of Quebec

Two new judges at the Court of Appeal of Quebec

The Honourable David Lametti, Minister of Justice and Attorney General of Canada, today announced the following appointments at the Court of Appeal of Quebec.

  • The Honourable Guy Cournoyer, a puisne judge of the Superior Court of Quebec for the district of Montréal, is appointed a puisne judge of the Court of Appeal of Quebec. Mr. Justice Cournoyer replaces Mr. Justice N. Kasirer, who was elevated to the Supreme Court of Canada on September 16, 2019.
  • Sophie Lavallée, a professor of the Faculty of Law at Université Laval in Québec, is appointed a puisne judge of the Court of Appeal of Quebec. Madam Justice Lavallée replaces Madam Justice D. Bélanger, who elected to become a supernumerary judge effective July 25, 2020.


Justice Guy Cournoyer received a Bachelor of Laws degree in 1986 from the Université du Québec à Montréal and was admitted to the Bar of Quebec in 1987.

In 2007, Mr. Justice Cournoyer was appointed to the Superior Court of Quebec (Montréal). At the time of his appointment, he was a partner with Shadley Battista, s.e.n.c., where he had developed his bilingual practice expertise in the areas of criminal law, military and disciplinary law, and the law and practice of public inquiries. In addition to acting as counsel for the Order of Quebec Optometrists and the Order of Quebec Dentists, Justice Cournoyer was a special counsel to the Gomery Commission and the Commission of Inquiry concerning la Sûreté du Québec (Poitras Commission). He also served as president of the Quebec Association of Defence Lawyers, president and vice-president of the Montreal Association of Defence Lawyers, and member of the Permanent Committee on Criminal Law of the Bar of Quebec .

Justice Cournoyer is also the author of several publications on criminal, military and disciplinary law.


Justice Sophie Lavallée has been a professor in the Faculty of Law at Université Laval since 2001, and served as law clerk at the Superior Court of Quebec (1996-98). She received her bachelor’s and master’s degrees in law from Université Laval and her doctorate from Université de Montréal and Université de Nice.

Called to the Barreau du Québec in 1997, Madam Justice Lavallée has regularly served as legal counsel on matters of environmental law and land use planning, notably for the Ministère de l’Environnement du Québec and the Organisation internationale de la Francophonie. She was awarded the Prix Minerve for her PhD dissertation on environmental law. She was co-author of the 4th edition of La Preuve civile with Professor Jean-Claude Royer and co-published a monograph on environmental law with Professor Jean-Maurice Arbour, which won the Quebec Bar Foundation award.

The author of numerous articles on environmental law and land use planning, Justice Lavallée has spoken at conferences in Canada and abroad. She has been a visiting professor at Université Paris-Sorbonne, Université catholique de Louvain, the Université de Strasbourg, and Université d’Aix-Marseille. In 2019, with her team, she received the Institut d’administration publique de Québec award for scientific contribution to Quebec public administration. She is a member of several boards of directors and scientific councils and a governor and member of the jury for the Quebec Bar Foundation essay contest.

Justice Lavallée and her spouse, Louis-Philippe Bélair, are the proud parents of two boys, Olivier and Nathan.


[Extract from press release issued today, October 1, by the Department of Justice Canada]

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