WI state law, the lowest level of provider allowed to staff an ambulance is EMT-B. Most local services run 2 paramedic crews. One service I work for is 1 emt, 1 medic. The other service is 1 emt, 1 intermediate. We use first responders as drivers if they're available on scene and we have a critical patient that requires both of us in the back or if we have multiple patients.