After classical education at the Séminaire de Trois-Rivières, Justice Lorne Giroux completed an LL.L. (summa cum laude) at Université Laval in 1968. He obtained a Masters Degree in Urban Legal Studies (LL.M.) from Harvard Law School in 1970, and a Doctorate in Law from Université Laval in 1976.
Beginning in 1970, he went on to teach at the Université Laval Faculty of Law, specializing in administrative, municipal, environmental and urban development law.
Called to the Quebec Bar in 1969, Justice Giroux practiced in the office of Grondin, Poudrier and Bernier, from 1972 to 2002, and Lavery, de Billy from 2002 to 2005.
He was appointed to the Court of Appeal on February 25, 2005.
Justice Giroux is the author of a book which examines legal aspects of zoning regulation in Quebec. He has also published articles in legal journals and other book chapters. He continues to serve as co-author of the chapter dealing with municipal powers respecting municipal planning in the Public and Administrative Law volume of the Collection de droit de l’École du Barreau.