Born in Quebec City on October 17, 1950, Justice Louis Rochette is the son of the late engineer Charles-E. Rochette and Lorraine Picard. He was raised in La Malbaie where he completed his secondary school studies. As of September 1966, he lived with his family in Quebec City where he carried out his post-secondary school studies at the CÉGEP de Sainte-Foy (D.E.C.) after which he attended the Faculty of Law at Université Laval, graduating with an L.L.L. in 1972.
Admitted to the Quebec Bar in 1974, he first practiced law in the office of St-Hilaire, De Blois and then, from 1975 to 1984, at the Department of Justice of the Government of Quebec, seconded to the Department of the Environment. Starting in 1984 he worked in the litigation section of the Quebec Office for Legal Affairs of the Quebec Department of Justice. He became the head of this Office in 1989, a post he maintained until he was appointed to the Superior Court.
Justice Rochette served as president of the Syndicat des avocats et notaires de la fonction publique (1987) (as it was then called) and also as founding director and subsequently president of the Association des cadres juridiques de la fonction publique (1991-1993). He was also president of the Professional Training Committee of the Quebec Bar (1992-1994), taught at Bar School (1989-1992) and participated in a number of conferences particularly dealing with administrative law, civil procedure and representation before tribunals.
He was appointed as a judge of the Superior Court of Quebec on November 1, 1994 and later served as president of the Conference of Judges of the Superior Courts of Quebec (1999-2000). He was appointed to the Court of Appeal of Quebec on February 1, 2000.