Cusson studied at the Institut Nazareth with Gustave Labelle, Alfred Lamoureux, Arthur Letondal, Achille Fortier and Romain Pelletier. With a Prix d'Europe, he continued his studies from 1924 to 1930 continued at the Ecole Normale de Musique in Paris with Nadia Boulanger, Charles Diran Alexanian and panzera.
Upon his return to Canada, he taught first counterpoint, Jean Papineau - Couture here was his most famous pupil. From 1943 to 1971 he taught ear training at the Conservatoire de musique du Québec. Over the years, studying with him, inter alia, Gaston Arel, Raymond Daveluy, Kenneth Gilbert, Bernard Lagacé, Aline Letendre, Lucienne L'Heureux - Arel and Michel Perrault. In the 1950s he was president of the Académie de musique de Québec ( AMQ ).
Cusson composed a cantata, theater music, two orchestral suites, a serenade for orchestra, motets and folk song arrangements.
- À la gloire de Jeanne Mance, cantata, 1942
- Antigone, incidental music
- Jonathan, incidental music
- Tobie, incidental music
- Canadian Composer
- Born in 1903
- Died in 1972