From 1939 to 1942, he served in World War II as part of the RCAF.

When he returned to Canada, he became one of the first French Canadians to be hired by the NFB and worked there as an editor until 1948.

It was here that he got to work on his first feature film, Le gros Bill (1949), co-directing with René Delacroix.

Bigras moved on to direct three feature films himself, including La petite Aurore l’enfant martyre (1951), a big hit with audiences and a staple of Quebec Cinema.

In 1953, he began working for Radio-Canada where he became one of its principal directors until his death in 1966.