Bathroom vent installation
Not many contractors I know would touch such a small project. I think you're looking for a handyman. E.g., I live in Chicago and there's a business called HandiCo. They'll do anything you want, after you pay them over a hundred dollars to show up, and about half of that per hour, until it's done.

You could try handyman.com, a contractor locator service.

I have no affiliation with either of these companies, nor have I used them.