After studying percussion at the Université de Montréal and at McGill University, Robert Leroux began at age 20 a professional career that brought him to play with the National Arts Center Orchestra in Ottawa, the «Grands Ballets Canadiens» Orchestra, the CBC Orchestra in Montréal and the Montréal Symphony Orchestra.
Aside from his orchestral activities, he dedicated most of his time to contemporary music and played with the Société de Musique Contemporaine du Québec, both as soloist and as member of the ensemble from 1969 to 1992. He was also invited as guest soloist by many contemporary music organisations in Canada such as New Music Concerts in Toronto, Music Inter Alia in Winnipeg and Days, Months and Years to Come in Vancouver, where he created pieces for percussion. Robert Leroux took part in the recording of numerous albums, music for film and television, and commercials. He is the co-founder of percussion ensemble Sixtrum, of which he was a member until 2013.
Robert Leroux has been professor of percussion at the Faculty of Music of the Université de Montréal from 1973-2013. He has been vice-dean from 1985-1988 and dean of music from 1988-1997. He was also dean of the Faculty of Continuing Education at the Université de Montréal, from 1997-2001.
As an artist and a manager, he was also involved as member of numerous boards of directors and public institutions in the fields of arts, research and academic administration.
Currently, Robert Leroux is President of the Conseil québécois de la musique and owner of Percumedia company.