He soon became one of the first members of the Riverdale String Ensemble under Canadian violinist Rosemonde Laberge, winning music festivals across Canada.
[1] He studied at the Le Conservatoire de Musique du Quebec in Montreal from 1970 to 1975 and at The Juilliard School in New York City from 1975 to 1979.
[2][3] Since the early 1980s, Derouin has worked with Christina Aguilera, Barenaked Ladies, Beck, Mary J. Blige, Michael Buble, Mariah Carey, Vanessa Carlton, Kelly Clarkson, Leonard Cohen, Dido, Aretha Franklin, Ben Harper, Avril Lavigne, Paul McCartney, LeAnn Rimes, Liz Phair, Shakira, Carrie Underwood, and Rufus Wainwright.
His other film credits include acting as concert master for Anchorman 2: The Legend Continues, Ted, Eragon, and Lemony Snicket's A Series of Unfortunate Events, and playing violin on motion picture soundtracks, much as Epic, Oblivion, Men in Black 3, and Watchmen.
[4][5] His writing credits include the score to the 1991 movie The Hitman starring Chuck Norris, and the track "Jane" on Stevie Nicks' 1994 Street Angel album.