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Marine Corps

Combat Support Roles

Marines in Combat Support Element roles serve as an integral piece in making the Marine Corps the efficient force it is today. Featured below are just a sample of the Military Occupational Specialties (MOS) Marines in these roles take on. These Marines are trained to provide logistics, intelligence communication, and other support to move equipment, ammunition, first aid and Marines to wherever they need to be to win the mission ahead. Without them, the force would stand still.


Air Defense Control Officers

Air Defense Control Officers direct and coordinate fighter aircraft in the interception of hostile aircraft and coordinate employment of surface-to-air missiles.  Air Defense Control Officer works in a Tactical Air Operations Center (TAOC). This is the principal air defense agency. Here the officer works in conducting surveillance, combat identification, tactical air traffic control, data link coordination, air intercept control, deep air support, and air battle management


Air Traffic Control Officers 

Air Traffic Control Officers command an Air Traffic Control (ATC)Detachment. They act as officers-in-charge of Air Traffic Control Facilities at Marine Corps Air Stations. They perform as Control Tower Operators and Radar Air Traffic Controllers. They coordinate and direct activities related to air traffic control and airspace management as staff officers at squadrons, Marine Air Control Groups (MACG)/Marine Aircraft Wings (MAW), and at other senior level units. ATC lieutenant will serve as a Marine ATC Mobile Team (MMT) Leader, ATC watch officer, or in another similar billet within the Marine Air Control Group (MACG). Regardless of billet, ATC officers are put in charge of Marines immediately upon arrival at their first command and frequently are in command throughout their first tour.


Aviation Maintenance Officer

Supervise the maintenance of aircraft and aviation equipment. Their duties ensure that all Marine Corps aircraft are ready to fly to support any mission.


Communications Officer

Communications Officers are the backbone for command and control of operating forces in the Marine Corps. They are responsible for the planning, installation, operation and maintenance of data, telecommunications and computer systems. On the battlefield, officers must be able to quickly establish communication capabilities. This MOS requires officers to stay informed of rapidly evolving technology involved in their day-to-day duties.


Ground and Human Source Intelligence Officers

Ground Intelligence Officers serve as staff officers and commanders in the operating forces where they analyze intelligence and planning, deployment and tactical employment of ground surveillance and reconnaissance units. The Ground Intelligence Officer may seek to become a recon marine after their training is done. 0307 Reconnaissance Officer.


Combat Engineers

Lead Marines in route reconnaissance, demolitions, mine and countermine warfare, obstacle emplacement, breaching and construction. Engineering is divided into four categories: mobility, counter mobility, survivability and general engineering. Officers find themselves performing many missions, such as building a bridge or repairing a medical clinic in a disaster-struck third-world country.



Adjutants coordinate administrative matters for Marine Corps staff sections and external agencies at the staff level. They ensure that every Marine in their command has administrative resources both for day-to-day tasks and long-term career progression.


Ground Supply Officer

Lead and train Marines in coordinating the equipment and material for mission requirements. They supervise the purchasing and contracting of supplies, manage budgets and develop spending plans. Their role ensures that Marines worldwide are properly equipped.


Aviation Supply Officers 

Make critical decisions concerning budget, inventory management, deployment, personnel and other support matters. Working as an Aviation Supply Officer allows you to develop mid-level management skills right out of your MOS school. It provides you an opportunity to lead as many as six to 40 Marines on your first assignment.


Logistics Officer

Have a high degree of visibility due to their critical role in planning strategies for every major unit in the operating forces. They perform a variety of duties including coordinating the movement of Marines and equipment from ship to shore to forward operating bases. This MOS allows officers to develop long-range projects, manage the supply chain and analyze data and performance.


Public Affairs Officers

Communicate the mission and interests of the Marine Corps to diverse stakeholders. These officers answer questions and inform the media of Marine Corps stories and events. They fulfill requests for aircraft, military bands, color guards and speakers. In addition, they write articles, publish base newspapers and manage websites. This profession is relatively small in respect to other MOSs but has a significant supporting staff role among all levels of command.


Financial Management Officers

Financial Management Officers are in charge of financial issues, such as managing budgets and disbursing operations. Officers who work in the finance section coordinate military pay and travel, while the comptroller side consists of budgeting, accounting and leading internal reviews

Military Police Officers

Military Police Officers

Provide essential support to their commanding officers with all facets of law enforcement. Officers begin this MOS either on-base, providing security and law enforcement, or on deployment, supervising maneuver and mobility operations and internment operations, as well as providing area security and law enforcement.

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