He was born in Montreal, Quebec and became an agent, businessman and insurance broker by career.
His next campaign was as a Liberal candidate in a by-election at St. Mary on 16 October 1950 where he won a seat in Parliament.
After his riding was renamed Sainte-Marie in 1952, he was re-elected for successive full terms in 1953 and 1957 then defeated by Georges Valade of the Progressive Conservative party in the 1958 election.
Having been awarded an MBE on July 1, 1946, Dupuis later returned the honour in response to the members of The Beatles receiving the same distinction in 1965.
This article about a Quebec Member of Parliament from the Liberal Party of Canada is a stub.