There are some exceptions for occupations and situations where an immigrant is legally allowed to work in Canada without a work permit. Any individual who is permitted to work without a work permit may still be recommended to obtain a Temporary Resident Visa or an eTA (Electronic Travel Authorization) to enter Canada temporarily.
Any person should also be prepared to present immigration officials with all documentation that shows their desired status in Canada. Depending on the situation, the documentation needed may vary. For instance, acquiring a letter of support from a parent company or proof of invitation from a Canadian company can aid in your likelihood of being accepted into Canada.
Occupations that do not demand a work permit are: -Athletes and team members -Aviation accident or incident inspector -Business visitor -Civil aviation inspector -Clergy -Convention organizers -Crew -Emergency service providers -Examiners and evaluators -Expert witnesses or investigators -Foreign government officers, representatives and family members of international representatives -Health care students -Implied status -Judges, referees and similar officials -Military personnel -News reporters, media crews -On-campus employment and some Off-campus work -Performing artists -Public speakers