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Navy NEC · IT & Cyber

C37A Cryptologic Infrastructure Maintenance Technician

Current service use not established

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

A Navy Enlisted Classification: a skill designation sailors hold in addition to their rating.

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Overview

A Cryptologic Infrastructure Maintenance Technician installs, maintains, and troubleshoots cryptographic and cryptologic networked systems. The technician performs scheduled and ad hoc maintenance and administers cryptologic and networked computer systems.

Minimum clearance: TS/SCI

Core Skills

  • Cryptographic system troubleshooting and maintenance
  • Installation of cryptologic networked systems
  • Cryptologic and networked computer administration

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.

Telecommunications Equipment Installers and Repairers, Except Line Installers

Installation, maintenance, and troubleshooting of cryptologic networked systems transfer to installing and repairing civilian communications equipment and networks.

How to prepare: Complete a hands-on telecommunications equipment lab that includes installation, fault isolation, and post-repair testing 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

Electrical and Electronics Repairers, Commercial and Industrial Equipment

Organizational-level maintenance and troubleshooting of cryptographic systems provide a foundation for diagnosing and repairing commercial electronic equipment.

How to prepare: Take a practical industrial-electronics troubleshooting course focused on component inspection, fault diagnosis, and testing repaired equipment.

What the civilian work involves
  • Test faulty equipment to diagnose malfunctions, using test equipment or software, and applying knowledge of the functional operation of electronic units and systems.
  • Inspect components of industrial equipment for accurate assembly and installation or for defects, such as loose connections or frayed wires.
  • Install repaired equipment in various settings, such as industrial or military establishments.
Civilian tools and software (examples)
  • Circuit evaluation software

Notes & Sources

Evidence for this guidance (3 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC C37A

    [1] NEC entry "C37A - Cryptologic Infrastructure Maintenance Technician"; cached text line 3467; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Cryptographic system troubleshooting and maintenance, Installation of cryptologic networked systems, Cryptologic and networked computer administration, Telecommunications Equipment Installers and Repairers, Except Line Installers (O*NET 49-2022.00), Electrical and Electronics Repairers, Commercial and Industrial Equipment (O*NET 49-2094.00)

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

    [2] O*NET 30.3 occupational data

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

  3. O*NET: Electrical and Electronics Repairers, Commercial and Industrial Equipment

    [3] O*NET 30.3 occupational data

    Supports: Electrical and Electronics Repairers, Commercial and Industrial Equipment (O*NET 49-2094.00)

Defense contractor jobs for C37A

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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