Marie-Hélène Breault specializes in 20th- and 21st-century repertoire. She has distinguished herself through her performances of works by Karlheinz Stockhausen, her participation in the premiere performances of several works by Canadian composers, and her collaborations with theatre and dance artists.

She is currently working on various projects, including an album dedicated to works by Claude Vivier, Gilles Tremblay, Ana Sokolović, Denis Gougeon and John Rea, with pianist Pamela Reimer and a concert of compositions by women, based on the work of Hildegard von Bingen.

Marie-Hélène Breault is a regular performer with the Ensemble contemporain de Montréal (ECM+) and the Société de musique contemporaine du Québec (SMCQ). The winner of numerous awards, she frequently receives grants for her projects from the Canada Council for the Arts (CCA) and the Conseil des arts et des lettres du Québec (CALQ). Marie-Hélène Breault teaches flute at the Université du Québec à Montréal (UQAM).