NO your licence is NOT valid here for driving Class 1 or air brake equiped vehicles, I would talk to your licencing people where you live, get an International drivers licence, when you come here, check that your international drivers licence will let you operated a class 3 vehicle as a learner with someone in the passenger seat who has either a Class 1 licence or better a Class one Instructors licence like I have. then you take an air brake course, takes an entire afternoon... about $150, with that you can either go and challange the road test for your class 3with air, or go right for the Class 1, you will need to pay a rental for the tractor/ trailer you wish to use. do the road test, have a basic medical exam and then you can drive here if you have a work visa.
Class 3 is Tandem axel tractor with a dump box and you can tow a pup. A Class 1 includes EVERY thing from Tractor trailer with multi trailer combos , to ambulance, police car, highway bus, school bus, Class one does not however cover Motorcycles.
If you do come here and end up on the island, I would be happy to take you for a few drives in a tractor as your class one "parent" but I would probably make you buy me lunch....
I was just thinking about the different circomstances, and you could come and drive here on a special permit if you came as part of a company or in your own tractor, while going across the country, but if your looking to come here and work for a Canadian company, you will need to go through the process I said in the above steps
Noel