Alright since you do not give us much information: immigrate?, contract?, seasonal - May to September?, one season?, etc.
Immigrate: Immigration Canada
Work visa: Canadian High Commission in Australia: good luck GYAIG if you want to work here this season.
Licence: Transport Canada
Job: Good luck. Be prepared to do a road tour to meet and greet the CPs
If you have not won a lottery yet try AC or Jazz, or WESTJET (a better bet) but the process is the same.
Google: "pprune aussie work immigrate canada TC" and work around those words. The first hits concern helicopter pilots but the mechanics are the same.
Once you have done some homework and still think that you want to do this, try again and you might get some names and addresses.