Canadian equivalent of I-94 visa waiver

The plan is to move to Montana, hopefully in the Missoula area. The job would mostly involve crossing into Alberta. I worked in Alberta for several years and crossed into the US many times, essentially this is the same in reverse.

I will be travelling on an Australian passport, so there is no problems crossing into Canada re: visa etc. I’m more interested in knowing if the process can be streamlined; as in not needing to get a new visa waiver every single time I cross… Potentially I could be crossing twice a week, so really need to try and make the process quick & painless (if possible :smiley:)