Marine Corps Enlisted Job Descriptions

MOS 3521 -- Automotive Organizational Mechanic

Marine HUMVEE
Marines amphib drop onto Somalia. gettys

There are many jobs within the Marine Corps Occupational Career Field 35 (Motor Transport).  This first MOS listed in this career field is the MOS 3521 - Automotive Organizational Mechanic.

This job is a Primary Military Occupational Specialty: (PMOS) reserved for the rank of Private to Sergeant.

Job Description: The automotive organizational mechanic services, inspects, maintains, and repairs motor transport equipment.

A Motor Transport Platoon transports Marine and supplies all units of the Marine Air - Ground Task Force (MAGTF).  Motor Transport vehicles include fuel and water tankers, 7 ton trucks, and High Mobility Multipurpose Wheeled Vehicles (HMMWVs) - also know as the HUMVEE

Job Requirements: A Marine seeking this job should have a very high interests in motors, mechanical systems, with civilian motor experience (hobby or professional) even though that is not necessary. Typical military mechanics are also hobby mechanics spending some of their free time in the base hobby shops working on their own vehicles.

(1) Must possess an MM score of 95 or higher.

(2) Complete the Automotive Organizational Maintenance Course.

Duties: For a complete listing of duties and tasks, refer to NAVMC 3500.39 - also known as the Motor Training and Readiness Manual (Motor T & R Manual) which supersedes the former training manual for motor transport MOC 1510.68B, Individual Training Standards.

All jobs in the military have Mission Essential Tasks (MET) and usually have several that make up the Mission Essential Task List (METL).  Below are the Missions Essential Tasks for the Automotive Organizational Mechanic: (from the NAVMC 3500.39)

MET 1:  Conduct Maintenance Operations

- Maintain Motor Transport Equipment

- Conduct Recovery Operations

MET 2:  Conduct Motor Transport Operations

Provide Licensing Program

- Conduct Convoy Operations

- Conduct Movement Control

- Establish a Tactical Motor Pool

- Conduct Refueling Operations

The Marine Mechanic is responsible for the maintenance and operation of all vehicles in the motor pool. Responsibilities range from the safe operation of the mechanics shop, storage of tools, storage of hazardous materials (fuels, lubricants, batteries) to troubleshooting vehicle failures (transmissions, steering, cooling, braking, electrical, and all other systems of a wide variety of vehicles).

Replacing complete engines and transmissions are also in the job descriptions of the Marine Motor Transport Mechanic. Operating diagnostic equipment and being able to trouble shoot the following systems are part of the in school training of the MOS 3521:

Trouble Shoot Faulty Engine System

Trouble Shoot Faulty Drive Train System

Trouble Shoot Faulty Steering System

Trouble Shoot Faulty Brake System

Trouble Shoot Faulty Electrical System

These skills are pulled verbatim from the Navy Marine Corps Motor Transports Training and Readiness Manual.  The skills and many others will be taught and tested in the Automotive Organizational Maintenance Course, or the Motor Vehicle Operator Course at Camp Lejuene, North Carolina.

Related Department of Labor Occupation Codes :

(1) Automobile Service Station Mechanic 620.261-030.

(2) Electrician, Automotive 825.281-022.