The Surface Engineering Community in the US Navy has nine ratings:
Electrician’s Mate (EM)
Engineman (EN)
Damage Controlman (DC)
Gas Turbine Systems Technician (GS)
Electrical (GSE)
Gas Turbine Systems Technician, Mechanical (GSM)
Hull Maintenance Technician (HT)
Machinery
The Surface Engineering Community has 23,574 enlisted Navy personnel. The Surface Warfare Engineering School Command Great Lakes (SWESC GL) has nearly 1,500 students at any one time. The staff at SWESC GL includes:
10 officers
Over 350 enlisted personnel
40 Department of the Navy civilians
Quartermasters
Boatswain Mates
Sailors from all surface engineering rates
The ratings range in pay grades from E5 to E9.