A work permit is needed for most temporary jobs in Canada, though for some positions and business people it is not necessary.
Some temporary workers require a work permit and some do not. For some categories of workers, permits are approved more quickly. The requirements and processing times depend on the sort of work you will do when you come to Canada.
Read the information on the CIC website to find out if you need a work permit or if you are in a special category where a work permit may not be necessary or is approved differently. If you are a visa exempt national, please see the Frequently Asked Questions page for additional information about work permits.
Remember, even if you do not need a work permit, you may need to meet other requirements. Read the information carefully.
There is a difference between coming to Canada as a business visitor and coming to Canada as a business person. Go to the CIC website for information about coming to Canada as a business visitor or as a business person.