The rules of the co-op system require students to accumulate at least 30% of their experience in the workplace. Graduate programs, for masters and doctoral degrees, are much shorter. So it is difficult to switch between work and study. That is why we are currently considering new programs that would allow people wanting to do graduate work to do a course that, thanks to Mitacs, includes a co-op component directly in a job. They would start with a work period, which would be something very new.
On December 7th, 2017. See this statement in context.