An individual who is eligible to work without a work permit may still require a Temporary Resident Visa or an eTA (Electronic Travel Authorization) to enter Canada on a temporary basis.
In addition, one should be prepared to present immigration officials with documentation that attests to their desired status in Canada. This documentation will vary on a case-by-case basis. Often, items such as a letter of support from a parent company or letter of invitation from a Canadian company can help to bolster one’s likelihood of acceptance into Canada.