As the successor of Louis Vierne in 1937, he was organist at Notre-Dame de Paris until his death in 1954.
Saint-Martin was heavily attacked for his appointment to Notre Dame by the Cathedral chapter, since it was done without competition.
These accusations were easily seen to be false by eye-witnesses, such as Pierre Cochereau, who took Saint-Martin's place as titular organist after the latter's death.
Saint-Martin was also a pious man, as he stated "but whatever the Good Lord wills is fine by me" concerning his death.
7 to the satisfaction of Dupré's wife, Jeanne Pascouau, at a time when Charles-Marie Widor stated that these pieces were unplayable.