In 1970, he began to collaborate with fellow poets Rafael Barreto-Rivera, Paul Dutton, and Steve McCaffery, forming the sound-poetry group The Four Horsemen.
Justin is currently finishing a film project based on the writing of Canadian poet BpNichol.
It is known for publishing early works by writers such as Fred Wah, Daphne Marlatt, Margaret Atwood, Michael Ondaatje, Ann-Marie MacDonald, George Bowering, Nicole Brossard, Gwendolyn MacEwen, Christopher Dewdney, bpNichol and Anne Michaels, Darren O'Donnell, Sean Dixon, Greg MacArthur, Matthew Heiti and Amiel Gladstone.
He graduated from York University with a BFA in Music and a BA in Creative Writing in 1985 where he studied writing with bpNichol, Frank Davey and music with David Mott, James Tenney, and Trichy Sankaran.
In 1970, he began to collaborate with fellow poets Rafael Barreto-Rivera, Paul Dutton, and bpNichol, forming the sound-poetry group, The Four Horsemen.
In 1971, he saw and heard a performance by a sound poetry group called The Four Horsemen consisting of bpNichol, Steve McCaffery, Rafael Barreto-Rivera and Paul Dutton.