A beloved figure in the world of animation, Back was nominated for four Oscars over the course of his career. His first animated short, Abracadabra, was produced in 1970, and over the next decade he directed five more shorts before making the Oscar-nominated Tout Rein, in 1981.
A year later his short Crac, which looks at the industrialization of Montreal from the point of view of a rocking chair, won the Oscar for best animated short. In 1988, Back won a second Oscar for L'homme qui Plantait des Arbres (The Man Who Planted Trees), which follows a lone shepherd who singlehandedly reforests a desolate valley, showing the far-reaching effect one dedicated individual can have. In 1994, Back was nominated again for Le Fleuve aux Grandes Eaux (The Mighty River), about the impact of pollution on the St. Lawrence River.
Back is survived by his daughter, Suzel Drapeau-Back.