marine corps communications
Marines

Marine Communications MOS Fields Explained

The 06XX Military Occupational Specialty (MOS) is a critical function in the United States Marine Corps.

Communications Marines are highly skilled and trained in both technical and tactical disciplines.

For enlisted Marines, they earn their title as Marines by going through Recruit Training.

Afterward, they will attend Marine Combat Training, and then they will attend their follow on MOS school.

Officers attend Officer Candidate School (OCS), followed by The Basic School (TBS) and their MOS school.

The 06XX occupational field provides command and control for commanders on the battlefield.

How that is accomplished changes based on the Marines’ specific MOS.

Below is a list of 22 Marines communications MOS’, as well as a brief description of each.

1. Transmissions System Operator (MOS 0621)

MOS 0621 Radio Operator during communication exercise
Image: Marines.mil

Rank: Private through Sergeant

Prerequisites

  • U.S. Citizenship
  • EL score of 105 or higher
  • Normal color vision
  • Secret Clearance Eligible

Commonly known as field radio operators, these Marines provide communication support for ground side operations.

This includes both manpack radios and vehicle-based radio systems.

0621s provide command and control for Marines on patrols, combat operations, recovery operations, and general support.

2. Troposcatter Transmissions System Operator (MOS 0623)

mos 0623
Image: Marines.mil

Rank: Private through Sergeant

Prerequisites

  • Must be a 0621

Troposcatter Transmissions System Operator school is a follow-on school for radio operators to provide them a more in-depth specialty.

These Marines specialize in providing command and control through troposcatter transmissions.

What this basically means is that they are trained in reflecting transmissions off the atmosphere for long-range communications.

3. Satellite Transmissions System Operator (MOS 0627)

mos 0627
Image: Defense.gov

Rank: Private through Sergeant

Prerequisites

  • U.S. Citizenship
  • EL score of 105 or higher
  • Normal color vision
  • Secret Clearance Eligible

Satellite Transmissions System Operators are experts in providing wideband satellite communications for command and control.

They use various satellite terminals to access satellite networks, enabling communication services in the most isolated regions of the planet.

4. Transmissions Chief (MOS 0629)

mos 0629
Image: Navy.mil

Rank: Staff Sergeant through Gunnery Sergeant

Prerequisites

  • U.S. Citizenship
  • EL score of 105 or higher
  • Normal color vision
  • Must have previously been a 0621 or 0627
  • Secret Clearance Eligible, Some billets require Top Secret Clearance.

A Transmission Chief is a supervisory role for the 0621 and 0627 fields, and they are experts in all things transmissions.

In addition to regular duties, this MOS is critical in the professional development of their junior Marines.

5. Network Administrator (MOS 0631)

mos 0631
Image: Defense.gov

Rank: Private through Sergeant

Prerequisites

  • U.S. Citizenship
  • EL score of 105 or higher
  • Normal color vision
  • Secret Clearance Eligible

Network Administrators maintain and operate Local Area Networks (LAN) and Wide Area Networks (WAN).

They install network components, monitor network security, and maintain services to maintain command and control.

6. Network Transport Technician (MOS 0633)

mos 0633
Image: Wikipedia.org

Rank: Private through Sergeant

Prerequisites

  • Must be a 0631

The Network Transport Technician MOS is a follow-on MOS to provide specialized training to 0631s.

0633s have the same responsibilities as a 0631, but they have additional training on cable management, cable installation, fiber optics, and coaxial cable.

7. Network Chief (MOS 0639)

mos 0639
Image: Navy.mil

Rank: Staff Sergeant through Gunnery Sergeant

Prerequisites

  • U.S. Citizenship
  • EL score of 105 or higher
  • Normal color vision
  • Must have previously been a 0631
  • Secret Clearance Eligible, Some billets require Top Secret Clearance.

Network Chiefs are the supervisory MOS for 0631s and are experts in network management.

They develop plans and strategies to provide a high level of service and security for command and control.

8. Spectrum Manager (MOS 0648)

MOS 0621 Radio Operator during communication exercise
Image: Marines.mil

Rank: Sergeant through Master Sergeant

Prerequisites

  • U.S. Citizenship
  • GT score of 105 or higher and CL score of 100 or higher
  • Normal color vision
  • Sergeant or above in the following MOS: 0621, 0627, 0629, or 0699
  • Secret Clearance Eligible, Some billets require Top Secret Clearance

Spectrum Managers plan and implement policies and frequency management.

To put it simply, they manage radio frequencies for military operations to ensure that Marine Corps units do not use unauthorized frequencies designated for other U.S. military forces and our allies.

9. Data Systems Administrator (MOS 0671)

mos 0671
Image: Navy.mil

Rank: Private through Sergeant

Prerequisites

  • U.S. Citizenship
  • EL score of 105 or higher
  • Normal color vision
  • Secret Clearance Eligible

Data Systems Administrators are the Marines responsible for logically managing networks.

This means that they set up and manage logical networks to ensure that people get the services they require.

This would include setting up policies, roles and responsibilities, servers, and anything including an operating system such as Microsoft Windows.

10. Applications Developer (MOS 0673)

Rank: Sergeant through Gunnery Sergeant

Prerequisites

  • Must be a 0671 or 0679

Applications Developers work with computer programming languages to design and manipulate databases.

They develop solutions to advanced logical issues to ensure command and control.

11. Data Systems Chief (MOS 0679)

mos 0679
Image: Navy.mil

Rank: Staff Sergeant through Gunnery Sergeant

Prerequisites

  • U.S. Citizenship
  • EL score of 105 or higher
  • Must be a 0671
  • Secret Clearance Eligible

Data Systems Chiefs provide senior leadership to manage logical networks.

They are experts in data systems, disaster recovery, and domain infrastructure.

One of the more important roles of Data Systems Chiefs is providing experienced insight to train and develop junior Marines.

12. Information Security Technician (MOS 0681)

mos 0681
Image: Navy.mil

Rank: Staff Sergeant through Master Gunnery Sergeant

Prerequisites

  • U.S. Citizenship
  • GT score of 100 or higher
  • Must be a Staff Sergeant or higher from any MOS
  • Top Secret Clearance Eligible

Information Security Technicians play an important role in communications security (COMSEC).

They provide oversight, management, and enforce communication security policies.

This is to ensure that sensitive information is not mishandled.

13. Communications Training Instructor (MOS 0691)

marines communications training instructor
Image: Marines.mil

Rank: Staff Sergeant through Master Gunnery Sergeant

Prerequisites

  • Must have been a 0629, 0639, 0679, 0681, or 0699
  • Secret Clearance Eligible

Communications Training Instructor develops training and curriculum to ensure that units can complete their mission.

They ensure force modernization and certify Marines to serve in critical billets.

14. Communications Chief (MOS 0699)

mos 0699
Image: Navy.mil

Rank: Master Sergeant through Master Gunnery Sergeant

Prerequisites

  • U.S. Citizenship
  • EL score of 105 or higher
  • Must have been a 0629, 0639, 0679
  • Secret Clearance Eligible. Some billets require Top Secret.

A Communications Chief is the senior enlisted advisor for Communications in a command.

They have a vast amount of experience in planning operations, manpower management, and training.

To ensure mission accomplishment, they work internally and externally to ensure command and control.

15. Communications Officer (MOS 0602)

marines communications officer - mos 0602
Image: Wikipedia.org

Rank: Second Lieutenant to Lieutenant Colonel

Prerequisites

  • U.S. Citizenship
  • Top Secret Clearance Eligible

Communications Officers are responsible for the deployment, installation, planning, operations, maintenance, and accountability of communication networks.

They ensure that their commands are following the proper guidelines put in place for communications.

16. Marine Air Ground Task Force (MAGTF) Communications Planner (MOS 0603)

Rank: Captain to Lieutenant Colonel

Prerequisites

  • U.S. Citizenship
  • Must be a 0602
  • Top Secret Clearance Eligible

A Marine Air Ground Task Force (MAGTF) Communications Planner coordinates with other elements to ensure that information is passed clearly through all stages of the planning process for military operations.

17. Cyber Network Operations Officer (MOS 0605)

Rank: Captain to Lieutenant Colonel

Prerequisites

  • Top Secret Clearance Eligible

A Cyber Network Operations Officers’ main duty is to implement Department of Defense Network Operations policies and guidance to mitigate possible cybersecurity risks.

They coordinate with other agencies internally and throughout the DOD to mitigate risk to ensure command and control.

18. Space and Waveform Integration Officer (MOS 0620)

Rank: Warrant Officer to Chief Warrant Officer 5

Prerequisites

  • Must have been a 0621, 0627, or 0629 when enlisted.
  • Secret Clearance required. Some billets require Top Secret.

Space and Waveform Integration Officers manage, plan, design, and engineer Over-The-Air (OTA) communication networks.

They ensure integration with Department of Defense Network Operations.

19. Network Engineering Officer (MOS 0630)

Rank: Warrant Officer to Chief Warrant Officer 5

Prerequisites

  • Must have been a 0631, 0639, 0671, or 0679 when enlisted.
  • Secret Clearance required. Some billets require Top Secret.

To enable command and control Network Engineering Officers manage, design, maintain, and deploy network infrastructure.

Their main responsibilities are to ensure quality control, operations, planning, budgeting, and technical analysis.

20. Strategic Electromagnetic Spectrum Officer (MOS 0640)

Rank: Warrant Officer to Chief Warrant Officer 4

Prerequisites

  • Must have been a 0648 with 3 years experience.
  • Top Secret

Strategic Electromagnetic Spectrum Officers manage and plan the use of electromagnetic spectrum systems to support operations.

They also develop policies on the proper use and deployment of electromagnetic spectrum systems.

21. Data Systems Engineering Officer (MOS 0670)

Rank: Warrant Officer to Chief Warrant Officer 5

Prerequisites

  • Must have been a 0631, 0639, 0671, or 0679 when enlisted.
  • Secret Clearance required. Some billets require Top Secret.

Data Systems Engineering Officers ensure that command and control is maintained by designing, deploying, analyzing, maintaining, and manage services to support operations.

22. Communications Training Instructor (MOS 0691)

Rank: Warrant Officer to Chief Warrant Officer 5, or Captain through Lieutenant Colonel

Prerequisites

  • Must be a 0602, 0620, 0630, 0640, or 0670.
  • Secret Clearance eligibility

The last Marines communications MOS on our list is communications training instructor, or MOS 0691.

Communications Training Instructors plan unit training, certify Marines to serve in critical billets, and develop personal and skillset evaluations.

They are experts in their field and use their knowledge of equipment capabilities and employment strategies to develop training curriculums.

See Also

Marine Corps Cyber Network Operator (MOS 0651)

Air Force Radio Frequency Transmission Systems (3D1X3)

Rob V.
Marine Corps Communication

Marine Corps Communication

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Learn more about the 22 different Marine Corps Communications MOS', and find out which one might be the right one for you.
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