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Marine Corps MOS · IT & Cyber

0631 Network Administrator

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A Network Administrator installs, operates, and maintains local and wide area networks, configuring routing and switching, premise wiring, network components, and cybersecurity measures. This administrator monitors network performance and bandwidth use, analyzes faults, tests circuits, troubleshoots connections from end to end, and records link status and maintenance actions.

Minimum clearance: Secret

Minimum ASVAB: CL 105 or EL 105

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: navmc-1200-1l-fy26 (source date 2025-03). Policy applicability has not been established.

See if you would hit this score: free ASVAB practice test

Core Skills

  • Circuit testing and end-to-end fault isolation
  • Quality of service and bandwidth management
  • Technical control site setup and wiring
  • Communications link activation and maintenance records

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Network and Computer Systems Administrators

Installing and maintaining LANs and WANs, configuring routing and switching, and monitoring network performance transfer directly to civilian network administration.

How to prepare: Build a small Linux network lab and document a configuration change, a connectivity fault diagnosis, and the steps used to restore service.

What the civilian work involves
  • Maintain and administer computer networks and related computing environments, including computer hardware, systems software, applications software, and all configurations.
  • Diagnose, troubleshoot, and resolve hardware, software, or other network and system problems, and replace defective components when necessary.
  • Operate master consoles to monitor the performance of computer systems and networks and to coordinate computer network access and use.
Civilian tools and software (examples)
  • Linux
  • Microsoft Active Directory

Telecommunications Equipment Installers and Repairers, Except Line Installers

Premise wiring, network component installation, circuit testing, and fault analysis align with installing and troubleshooting telecommunications equipment.

How to prepare: Complete a hands-on equipment-testing lab that uses circuit diagrams and test meters to isolate a fault and verify the repair against specifications.

What the civilian work involves
  • Test circuits and components of malfunctioning telecommunications equipment to isolate sources of malfunctions, using test meters, circuit diagrams, polarity probes, and other hand tools.
  • Test repaired, newly installed, or updated equipment to ensure that it functions properly and conforms to specifications, using test equipment and observation.
  • Assemble and install communication equipment such as data and telephone communication lines, wiring, switching equipment, wiring frames, power apparatus, computer systems, and networks.
Civilian tools and software (examples)
  • Cisco IOS

Training & Development

Choose credentials for your target role. COOL funding markers describe program listings, not a guarantee of eligibility or funding.

Getting Started

  • CompTIA Network+ · Funded

    Validate vendor-neutral networking knowledge, including network resilience, virtualization, and security concepts used in network administration.

    For: Network and Computer Systems Administrators

  • Cisco Certified Network Associate (CCNA) · Funded

    Validate network access, IP connectivity, IP services, security fundamentals, and automation knowledge for associate-level network administration.

    Eligibility and preparation: Cisco lists no prerequisites for the certification exam.

    For: Network and Computer Systems Administrators

  • Associate Electronics Technician (CETa)

    Build foundational knowledge of circuits, test equipment, electrical theory, and telecommunications fundamentals for equipment installation and repair.

    For: Telecommunications Equipment Installers and Repairers, Except Line Installers

Notes & Sources

Evidence for this guidance (6 documents)
  1. NAVMC 1200.1L (FY26, in force): MOS 0631

    [1] MOS 0631 section "a. Summary"; cached text line 30299; NAVMC 1200.1L signed 2025-03-07, in force until 2026-10-01

    Supports: Circuit testing and end-to-end fault isolation, Quality of service and bandwidth management, Technical control site setup and wiring, Communications link activation and maintenance records, Network and Computer Systems Administrators (O*NET 15-1244.00), Telecommunications Equipment Installers and Repairers, Except Line Installers (O*NET 49-2022.00)

  2. O*NET: Network and Computer Systems Administrators

    [2] O*NET 30.3 occupational data

    Supports: Network and Computer Systems Administrators (O*NET 15-1244.00)

  3. O*NET: Telecommunications Equipment Installers and Repairers, Except Line Installers

    [3] O*NET 30.3 occupational data

    Supports: Telecommunications Equipment Installers and Repairers, Except Line Installers (O*NET 49-2022.00)

  4. COOL credential mapping: CompTIA Network+

    [4] 0631 cached COOL credential feed

    Supports: CompTIA Network+

    [5]CompTIA: Network+ (Plus) certification exam details · Exam details; retrieved 2026-09-23

    Supports: CompTIA Network+

  5. COOL credential mapping: Cisco Certified Network Associate (CCNA)

    [6] 0631 cached COOL credential feed

    Supports: Cisco Certified Network Associate (CCNA)

    [7]Cisco: CCNA certification · How to earn your CCNA, Core exam 200-301 CCNA; updated 31 August 2026, retrieved 23 September 2026

    Supports: Cisco Certified Network Associate (CCNA)

  6. COOL credential mapping: Associate Electronics Technician (CETa)

    [8] 0631 cached COOL credential feed

    Supports: Associate Electronics Technician (CETa)

    [9]ETA International: Associate Certified Electronics Technician · CETa description and CETa Exam Info; retrieved 2026-09-23

    Supports: Associate Electronics Technician (CETa)

Defense contractor jobs for 0631

Predecessor codes

Historical codes with documented links to 0631. Each history page explains the change.

0612Tactical Switching Operator (PMOS)0619Telecommunications Systems Chief (PMOS)0651Cyber Network Operator (PMOS)0659Cyber Network Systems Chief (PMOS)2821Technical Controller (PMOS)

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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