What is the rank structure for the ambulance services?

You can start as a Basic EMT... Then an Intermediate EMT... and finally a paramedic. When they become para-gods, some can specialize in pediatric advanced life support, or cardio advanced like support. And depending on how experienced they are, can become senior paramedics, which are basically supervisors, etc. But that'a all said in the order or "rank" they go in when working on an ambulance.