He subsequently moved to Vancouver to pursue an MFA at UBC, where he won the creative writing department's prize for playwriting.
He returned to Toronto in 1979, and while he considered himself to be an independent artist and poet, he worked at various jobs including security guard and assistant immigration officer at Pearson Airport.
It was during the mid 1980s that he immersed himself in the literary and theatrical world and met Lenore Keeshig-Tobias and Tomson Highway and co-founded the short-lived but influential "Committee to Re-Establish the Trickster".
Embracing the philosophy that Indigenous artists could not know where they were going if they did not know where they came from, he began writing plays in earnest, and by the late 1980s and into the 1990s, he had already written some of his groundbreaking work, much of it produced by the Toronto based company Native Earth Performing Arts.
Throughout his career, Moses continued to publish his writing widely – a body of work that includes drama, poetry, short stories and essays – in his own books and in literary journals and anthologies.
These publications range from small presses, including Theytus Books' Gatherings anthology series and Exile Editions' Native Canadian Fiction and Drama (edited by Moses) to large publishers, including W.W. Norton's The Norton Anthology of Drama, Vol.
In 1992,1998, 2005 and 2013, Moses himself co-edited the seminal text, An Anthology of Canadian Native Literature for Oxford University Press.