Sync Service step handlers to Import-Module?

So this seems like a super simple question, but I've never actually had to use Step Handlers or Connection Handlers before.

I'm looking to write some attribute translation code for a couple of specific attributes that require that a module be loaded. I would have thought that the logical place to do this would be in the Step Handler so that it's loaded once when the workflow step starts, instead of having to load it the attribute script where it would have to be loaded one time for every object processed. My initial results appear to show that this is not the case, though... whatever I load via Import-Module in the Step Handler is not available to the attribute script(s).

Is there something obvious that I'm missing here? I'm sure that many other people must have had this same question, but I can't seem to find anything on it.