He was born on April 28, 1930, in Saint-Jérôme, Quebec, and made a career in education.
Proulx won a seat in the 1966 Quebec election in the district of Saint-Jean as a member of the Union Nationale. In November 1969 he left his party to protest the passage of Bill 63,[3] a controversial language law, sitting first as an independent, and then fifteen days later joining the Parti Québécois (PQ). He ran as a PQ candidate in 1970 and 1973, but lost both times.
He was returned to the legislature in 1976 and won re-election in 1981. During the Parti Québécois Crisis of 1984, Proulx temporarily sat as an Independent to promote a more proactive approach concerning the promotion of sovereignty. Proulx lost re-election in 1985.
