mos.directory

Marine Corps MOS · IT & Cyber

0671 Systems and Infrastructure 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

Systems and Infrastructure Administrators support Linux, Microsoft, and Unix clients and network operating systems for command and control. They administer Active Directory, DNS, public key infrastructure, unified communications, storage, and virtualization, integrate warfighting applications, and troubleshoot hardware and software.

Minimum clearance: Secret

Minimum ASVAB: CL 100 or EL 100

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-1200-1m-fy27 (source date 2026-03). Policy applicability has not been established.

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

Core Skills

  • Active Directory and DNS administration
  • Public key infrastructure administration
  • Storage administration and system virtualization
  • Unified voice and video communications

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

Military work with Linux, Microsoft, and Unix operating systems, Active Directory, DNS, client/server configuration, and hardware/software troubleshooting transfers directly to civilian systems administration.

How to prepare: Build a virtualized server lab with directory services and DNS, then document a backup-and-restore test and troubleshooting results.

What the civilian work involves
  • Maintain and administer computer networks and related computing environments, including computer hardware, systems software, applications software, and all configurations.
  • Perform data backups and disaster recovery operations.
  • Diagnose, troubleshoot, and resolve hardware, software, or other network and system problems, and replace defective components when necessary.
Civilian tools and software (examples)
  • Linux
  • Microsoft Active Directory
  • Bash

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 networking, virtualization, and network-resilience knowledge that supports administration of connected server environments.

    For: Network and Computer Systems Administrators

  • CompTIA Security+ · Funded

    Validate core security skills for securing systems and responding to security events; CompTIA recommends Network+ and two years in a security or systems administrator role as preparation.

    For: Network and Computer Systems Administrators

Notes & Sources

Evidence for this guidance (5 documents)
  1. NAVMC 1200.1M (FY27): MOS 0671, Systems and Infrastructure Administrator

    [1] Chapter 3, OccFld 06, MOS 0671; printed pp. 3-73 to 3-74; PDF pp. 491-492; cached text lines 29881-29949; primary PDF cached 2026-08-03, reviewed 2026-10-03

    Supports: Active Directory and DNS administration, Public key infrastructure administration, Storage administration and system virtualization, Unified voice and video communications, Network and Computer Systems Administrators (O*NET 15-1244.00)

  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. COOL credential mapping: CompTIA Network+

    [3] 0671 cached COOL credential feed

    Supports: CompTIA Network+

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

    Supports: CompTIA Network+

  4. COOL credential mapping: CompTIA Security+

    [5] 0671 cached COOL credential feed

    Supports: CompTIA Security+

  5. CompTIA Security+ exam details

    [6] Exam details, recommended experience

    Supports: CompTIA Security+

Defense contractor jobs for 0671

Predecessor codes

Historical codes with documented links to 0671. 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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