Machinist’s Mate

Navy NECs

The Navy Enlisted Classification (NEC) system supplements the enlisted rating structure in identifying personnel on active or inactive duty and billets in manpower authorizations. NEC codes identify a non-rating wide skill, knowledge, aptitude, or qualification that must be documented to identify both people and billets for management purposes.

For example, if a Navy police officer ( MA -- Master at Arms ) receives specialized training as a K-9 Dog Handler, he/she would be awarded NEC MA-2005.

From that point on, the sailor could be assigned to Navy law enforcement duties involving military working dogs.

Below are the NECs for the MACHINIST'S MATE community area:

MM-4201 Cryogenics Technician, Overseas Shore Based Equipment Operator/Maintainer (APPLIES TO: MM)

MM 4204 Steam Propulsion Maintenance Supervisor (APPLIES TO: MM)

MM 4206 Shipboard Engineering Plant Program Manager (APPLIES TO: MM, EM, EN, IC, GSE, GSM, GS)

MM-4208 Automated Electrolytic Oxygen Generator (AEOG) Maintenance Technician (APPLIES TO: MM, EM, ET)

MM-4222 NAMTS Pump Repair (APPLIES TO: MM, EN, GSM)

MM-4223 NAMTS Air Conditioner and Refrigeration (APPLIES TO: MM, EN)

MM-4225 NAMTS Boiler Repair Technician (APPLIES TO: MM)

MM-4230 SSN/SSBN Auxiliary Equipment Operator (APPLIES TO: MM)

MM-4231 SSN/SSBN Auxiliary Equipment Technician (APPLIES TO: MM)

MM-4232 SSN/SSBN Weapons Equipment Operator (APPLIES TO: MM)

MM-4233 SSN/SSBN Weapons Equipment Technician (APPLIES TO: MM)

MM-4234 SSN 774 Class Advanced Auxiliary Equipment Technician (APPLIES TO: MM)

MM-4235 SSN 751-773 Submarine Vertical Launch System Tube Maintenance Technician (APPLIES TO: MM, FT)

MM 4246 SSN/SSBN Diesel Engine (Fairbanks Morse) Maintenance Technician (APPLIES TO: MM)

MM 4247 SSN 719 - 725 and 750 Submarine Vertical Launch System Tube Maintenance Technician (APPLIES TO: MM, FT)

MM 4252 Electrolytic Oxygen Generator (Model 6L16) Operator (APPLIES TO: MM, EM, IC)

MM-4254 Oxygen Plant Operator/Maintenance Technician (APPLIES TO: MM)

MM 4283 High and Low Pressure Cryogenic Technician (APPLIES TO: MM)

MM 4291 Refrigeration and Air Conditioning Systems Technician (APPLIES TO: MM, EN)

MM 4295 UNREP Equipment Mechanic (APPLIES TO: MM, EN)

MM 4296 Shipboard Elevator Hydraulic/Mechanical System Mechanic (APPLIES TO: MM, EN, TM, GM, AO)

MM-4502 Boiler Repair Technician (APPLIES TO: MM)

MM-4508 Electronic Automatic Boiler Controls Console Operator (APPLIES TO: MM)

MM-4509 Electronic Automatic Boiler Controls Maintenance Technician (APPLIES TO: MM)

MM-4513 Automatic Combustion Control (General Regulator) Maintenanceman (APPLIES TO: MM)

MM-4533 Automatic Combustion Control Console Operator (General Regulator) (APPLIES TO: MM)

MM-4540 NAMTS Valve Repair Technician (APPLIES TO: MM, EN )

MM-4541 NAMTS Hydraulics Repair Technician (APPLIES TO: MM, GSM, EN )

MM-4542 NAMTS Outside Machinist (APPLIES TO: MM, EN )