06 Communications
Marine Corps OccFld 06 is the field that keeps units connected. It covers the Marines who build, run, secure, and troubleshoot the communications systems that support command and control in garrison and in the field.
It follows the FY2026 field structure and current PMOS names rather than older recruiter shorthand that grouped many jobs under looser radio or data labels.
The marines.com 06-field resource page says Marines in the communications field design, install, connect, and operate communication networks and information systems. The current NAVMC 1200.1L MOS Manual adds that the field includes the design, installation, interconnection, operation, and defense of networks for secure, non-secure, and coalition information exchange in tactical and garrison environments.
That is a good way to think about 06 as a whole. Some jobs in the field focus more on transmissions and expeditionary communications. Others lean harder into switching, routing, operating systems, or unified communications. They all exist to keep information moving where commanders need it.
At a Glance
| Area | What to know |
|---|---|
| Field purpose | Build, operate, and defend communications, transmission, network, and data systems that support command and control |
| Representative enlisted roles | 0621 Transmissions System Operator, 0631 Network Administrator, 0671 Data Systems Administrator |
| Screening themes | Security eligibility, technical aptitude, color vision, and comfort with complex systems |
| Training anchor | Basic Communications Course first, then MOS-specific training at Twentynine Palms or related communications schools |
| Reserve note | Reserve opportunities exist where communications billets and units exist, but the exact mix depends on unit mission and equipment |
Which Role Fits You?
Choose 0621 Transmissions System Operator if you configure the radio stack before the battalion moves.
Choose 0631 Network Administrator if you own the routing table.
Choose 0671 Data Systems Administrator if you get the call at 0130 because active directory is down and nobody can log into the command post systems.
Common Entry Requirements
All enlisted Marines in this occupational field enlist with a minimum AFQT of 31, a high school diploma, U.S. citizenship, and MEPS medical clearance. Boot Camp is the first training gate: 13 weeks at MCRD San Diego or Parris Island. After graduation, Marines complete Marine Combat Training or the Infantry Training Battalion before attending their MOS-specific school. See each role’s profile below for specific ASVAB line scores, training details, and additional requirements.
Career Field Directory
- 0621 Transmissions System Operator : You configure the radio stack before the battalion moves
- 0631 Network Administrator : You own the routing table
- 0671 Data Systems Administrator : You get the call at 0130 because Active Directory is down and nobody can log into the command post systems
Related Resources
If you are aiming for enlisted 06 work, start with the ASVAB guide and PiCAT guide for score planning. Then use How to Enlist and Active vs. Reserve before narrowing down to one communications specialty.