R/M is kinda short people right now but with the merger people are too busy to put through an academy. Wait a few weeks and apply, make sure to follow up with a phone call to R/M they get a lot of applications. And as others have said that the merger of Pridemark and R/M should create a few openings simply from the fact that both places needed to hire before the merger and neither could during.
AMR is always hiring, again follow up with a phone call. Honestly there is no winning with the privates in the area, they all kinda suck in their own way, Pridemark was the best of the privates but there is some rumors that they are going to lose the boulder 911 contract and Arvarda Fire is trying to get their own ambulance running. AMR is mostly transfers, the 2 911 contracts are hard to get into because it is based on seniority. R/M's contract with Aurora Fire Department is awful, AFD has something called "med control" which means that they treat R/M like a strecher jockeys, and R/M can only sit there while AFD tries to kill patients; if R/M employees try to say anything they get fired. Denver Health is the last bastion of real EMS in Denver, but they only hire medics and have extremely high standards.
Any questions feel free to PM me.