What experience do you have? What have you worked as before? This is a pretty big factor.
Whistler gets allot of people turning up for jobs, and most will have experience doing something.
Working for the mountain can be good for the benefits such as free pass, cheap housing and meal deals. As said before dont be a liftie you will barley ride. The rental shops may be your best bet, as you can work nights or do split shifts. Most shops do not require experience to be a rental tech. The money is not great, but the benefits more then make up for it.