Pagosa actually has a full time medic spot open right now though you may need to have a critical care certification. Very isolated part of the state though.
Thompson Valley is supposed to be a pretty awesome place to work though I don't know much more than that. Also in the area is UCHealth EMS (Poudre Valley Hospital) in Fort Collins/Larimer County. They are undergoing some changes but still supposed to be a great spot.
You probably have noticed that there's lots of fire based stuff going on in the front range...
Other EMS only options on the front range with decent size:
Denver Health
Banner Health Weld County Paramedics (Greeley and surrounding)
Platte Valley Hospital Paramedics (Brighton and surrounding)
Ute Pass Regional HSD Paramedics (West of Colorado Springs)
The following are more ski country:
Summit County Ambulance
Eagle County Ambulance (Vail/Beavercreek)
Clear Creek County Ambulance (East of the Eisenhower Tunnel on I70)
Gilpin County Ambulance Authority East of the Eisenhower Tunnel on I70)
Grand County EMS (Winter Park and Grandby)
South Park Ambulance District (Fairplay)
Chaffee County Ambulance (Buena Vista and Salida)
Gunnison Valley Health Paramedics
Aspen Ambulance District
St. Vincent Hospital Paramedics (Leadville)
Other more isolated spots:
Delta County Ambulance District (south of Grand Junction)
Trinidad Ambulance District (south of Pueblo)
Southwest Memorial Hospital Paramedics in Cortez (way SW corner of the state)
Southwest Teller County Hospital District EMS
Alamosa Ambulance District, Costilla County, and Conejos County are all south central third services
Nearly all of these places will be on at least 24s, usually 48s, and some longer. Salaries ranging from ~40-65k for paramedics depending on the financial status of the region. Not really sure about EMTs, I know for me I went up almost 50% when I got my medic. Getting on as an EMT for any of those places could be challenging, many will want to hire off part time/PRN rolls.
AMR has decent 911 operations in Boulder, Longmont, Golden, Colorado Springs, and Pueblo. All but Pueblo have some uncertain futures however.