Born in Plantagenet, Ontario, the son of Henri de Montpellier Beaulieu and Berthe Lalonde, he was educated in Montreal and became a notary in 1956.
In 1966, he was the President of the Union Nationale's electoral campaign and was the Chief of Staff to Premier Daniel Johnson and Deputy Minister of Executive Council from 1966 to 1968.
He was elected in a March 1969 by-election in the riding of Dorion and was appointed Minister of Immigration in Jean-Jacques Bertrand's cabinet, in which he served until 1970.
He ran unsuccessfully in 1971 for the leadership of the Union Nationale, placing third, behind victor Gabriel Loubier and Marcel Masse.
In 1990, he was appointed to the Senate representing the senatorial division of De la Durantaye, Quebec as a Progressive Conservative, he resigned in June 1994.