After failing to establish himself as an actor in the 1950s, Dor undertook a career in radio as a disk jockey and news director. In 1964 he was encouraged by friends to compete in an amateur singing competition. He began singing professionally in early 1965, and released his first album in 1966. One of the songs from this album, his composition "La Complainte de La Manic," whose lyrics were a love letter written by a construction worker on the Manicouagan power project, became the most successful record ever by a Quebec chansonnier.
He continued to perform as a singer until 1972, and to record until1978. After that he worked mainly in the theatre and in television, producing and writing plays and téléromans. He also wrote two novels and published several collections of poetry, among other artistic and critical accomplishments.
Dor then gave recitals at the Comédie-Canadienne in 1969 and at the Théâtre Port-Royal (PDA) in 1970 and also performed at the boîte à chansons La Butte à Mathieu in Val-David (north of Montreal) and at the Art Centre in Percé.
Gaston Miron thus assessed GeorgesDor's travel through song: 'It was the society of 1965, among and with others, a man who became aware of himself and of his situation, who lucidly and with faith took hold of himself.
In this, GeorgeDor did not belong to a new generation of chansonniers; he was a new man, the new man that we were all striving to become'.