She was raised in St. John's, Newfoundland and Labrador,[1] and studied at Mount Allison University in Sackville, New Brunswick, graduated in 1994 and then continued her education at the University of New Brunswick.
Sinclair's first collection of poetry, Secrets of Weather and Hope (2001), was a finalist for the 2002 Gerald Lampert Award.
Her third collection, The Drunken Lovely Bird, won the International Independent Publisher's Award for Poetry.
Breaker was a finalist for the Pat Lowther Award and the Atlantic Poetry Prize, and Heaven's Thieves won the Pat Lowther Award.
She currently teaches in the English department at the University of New Brunswick in Fredericton.