Pelletier was one of the most influential music educators in Canada during the 20th century. It was largely through his efforts that the Conservatoire de musique et d'art dramatique du Québec (CMADQ), an organization which has established and oversees nine different schools of higher education in music and theatre in Quebec, was established in 1942. From 1943 through 1961 he served as the director of the CMADQ and its first school the Conservatoire de musique du Québec à Montréal. He also served as the first director of the CMDAQ's second school, the Conservatoire de musique du Québec à Québec, from 1944 to 1946, and was instrumental in establishing the Conservatoire d'art dramatique du Québec à Montréal in 1954.
