Two options to work in Canada are to travel on a temporary visa and apply for a work permit (known as an employment authorization or EA), or to become a permanent resident of Canada. To obtain an EA, a visa applicant must have an offer to work in Canada validated by Human Resources Development Canada (HRDC). This means that the employer has to prove that a Canadian citizen or resident could not fill the position. The validation process is complicated unless the applicant is a software or IT professional, a member of the Youth Exchange Program, or the spouse of a Highly Skilled Temporary Worker.

This is just a sample of what you'll find in the complete Canada guide.