You may be able to get certified as an EMT, but most EMS insurance companies won't touch you until you are 21...(at least to drive the bus anyways) I know one o the companies I worked for was insured by of all people Lloyd's of London (which prompted me to loudly annouce that I wopuld gladly remember that if my Ambulance ever sank<G>) BUT LLoyd's had a 21 year ld rule for licensed drivers.