In Canada, work rights are available to international students while studying and also upon finishing a degree or diploma.

During your studies

Canada recently announced new regulations for international students. As of June, 2014, students do not need to apply for a separate work visa to work off-campus, and are eligible to work as soon as their program of study begins.

Canada provides extensive work and career opportunities for all types of students. Many institutions in Canada offer a co-operative education program. This is a structured program where students alternate between periods of work and study. This integrated curriculum is achieved through a partnership between the educational institution and industry.

After graduation

International graduates from Canadian higher education institutions also have the opportunity to work in Canada for up to three years following the completion of their program.

To work in Canada after you graduate, you must apply for a work permit under the Post-Graduation Work Permit Program (PGWPP). If you would like to look into staying in Canada as a permanent resident after you finish your studies, there are several programs available, each with its own requirements.

Reference
www.cic.gc.ca/english/study/work.asp