there's no need to get your EMT-B. RN's can work in a "Critical care ambulance" on the private sector. You get to work with two "critical care paramedics" in the ambulance. The service provider is here in Chicago and suburbs. You do about 3-5 runs per shift, and most are emergency calls. As far as getting your EMT-B, you can get it in less than one month, for free, if you agree to work for this provider. Let me know if you need more info.