There are two types of work permits in Canada:
The purpose of the LMIA is for employers to demonstrate to the Canadian government that the hiring of a foreign worker will not have a negative impact on Canada's existing workforce. The federal department of Employment and Social Development Canada (ESDC) wants to ensure that the hiring of foreign workers will not displace existing workers in Canada nor place downward pressures on their wages.
Although the LMIA process is the rule, there are many different LMIA-exempt work permits, resulting from free trade agreements, such as the former North American Free Trade Agreement, now known as the Canada-United States-Mexico Agreement, or CUSMA. These free trade agreements enable foreign workers to apply for a work permit without their employer having to obtain an LMIA. In addition to these employer sponsored work permits, there are a number of work permit options available to foreign workers who do not yet have a job offer, including working holidays, post-graduate work permits, and open spousal work permits.
The common scenarios under which one can work in Canada:
Post-Graduation Work Permits