Most of the municipal FDs in my area have a Paramedic-Firefighters exclusively. I actually checked on this thinking I would like to get into my local department but was told they don't hire standalone EMTs. Where you will find that sort of thing is in Hospital-based or some of the county departments have the two-tiered system.
I will probably be looking outside the state for two-tier since I would love to work EMS for a major city dept. but would rather not be a firefighter (not that there's anything wrong with that).