Boston Emergency Meical Services (Boston EMS) provides advanced life support (ALS) and ambulance transport for the city of Boston, Massachusetts, USA. Boston EMS is a bureau within the Boston Public Health Commission, and employs over 300 emergency medical technicians (EMT) and paramedics. Boston EMS is a separate agency from the Boston Fire Department. Boston EMS only hires EMTs, and then promotes paramedics from within the department.