In 1949, at age 26, Pierre Cochereau was appointed director of the Le Mans Conservatory, a term he occupied for seven years. In 1955, he succeeded Léonce de Saint-Martin (1886–1954) as titular organist at Notre Dame Cathedral in Paris, after applying to the post just days before the deadline. However, a delay occurred, due to Cochereau's failure to provide a home address.
