Olivier St-Pierre is a Montreal-based composer, pianist, and organist specializing in contemporary music. Active as a pianist since childhood, Olivier first pursued studies in philosophy before returning to music and completing competitions in instrumental composition and analysis at the Conservatoire de musique de Montréal, under the guidance of Nicolas Gilbert and Jimmie LeBlanc.

Since 2019, he has served as the principal organist at the Sanctuaire-du-Saint-Sacrement in Montreal, where he regularly presents programs dedicated to 20th- and 21st-century organ repertoire. In addition to his work as a composer and performer, Olivier has been teaching at the École de musique Vincent-d’Indy in Outremont since 2021 and has collaborated with the journal Circuit, musiques contemporaines.
His artistic approach focuses on exploring the relationship between sound and time, drawing on microtonality and polyrhythm within a resolutely experimental perspective. His music has been performed by numerous ensembles across Quebec and Canada.