[1] He represented the electoral district of Compton—Stanstead as a member of the New Democratic Party.
Rousseau was defeated in the 2015 Canadian federal election by Liberal Party of Canada candidate Marie-Claude Bibeau.
Prior to being elected, Rousseau was a worker in showbusiness.
He studied in administration at the Cégep de Sherbrooke and has a Bachelor's degree in industrial relations from Université Laval.
[2] He was the Green Party of Canada candidate in Compton—Stanstead for the 2019 Canadian federal election.