Bathroom fan--- who do I call?

[Tea-rific]

We need a new bathroom fan. Ours is really loud and is currently on the same switch as our light. I would like to have a new fan installed along with adding a new switch so the light and fan are separate. 

Do I call an electrician? Hvac? Handyman?

[AmyRI]

Electrician.

[FoxInFiji]

Usually you call a mechanical contractor and they either have an electrician on their payroll or they work with an electrical contractor. But if it's a simple swap almost anyone can do it (electrician, DIY, handyman). Depending on your local code a licensed electrician may be required.