Navy NEC · IT & Cyber

C27D Submarine Carry-On Equipment (COE) Team Leader

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.

Overview

A Submarine Carry On Equipment Team Leader oversees the installation and certification of submarine cryptologic equipment and associated systems. The team leader certifies network systems, identifies potential risks, monitors activity, secures network environments, and enforces security policies and procedures.

Minimum clearance: TS/SCI

Core Skills

Network systems security assessment and certification
Network risk identification and activity monitoring
Security policy enforcement for network environments

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.

Information Security Engineers

Network certification, risk identification, activity monitoring, and security policy enforcement transfer directly to security-control assessment and network protection.

How to prepare: Build a Linux lab and produce a security-control assessment showing the controls tested, weaknesses found, and corrective changes verified.

What the civilian work involves

Coordinate monitoring of networks or systems for security breaches or intrusions.
Assess the quality of security controls, using performance indicators.
Train staff on, and oversee the use of, information security standards, policies, and best practices.

Civilian tools and software (examples)

Linux
Microsoft PowerShell

Computer Network Support Specialists

Experience certifying network systems, monitoring activity, and securing network environments supports network security configuration and operational troubleshooting.

How to prepare: Set up a Windows Server test network, configure group access permissions, and document the diagnosis and resolution of a deliberately introduced connectivity fault.

What the civilian work involves

Configure security settings or access permissions for groups or individuals.
Identify the causes of networking problems, using diagnostic testing software and equipment.
Document network support activities.

Civilian tools and software (examples)

Microsoft Active Directory
Microsoft Windows Server

Notes & Sources

Evidence for this guidance (3 documents)

NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC C27D
[1] NEC entry "C27D - Submarine Carry-On Equipment (COE) Team Leader"; cached text line 3282; NAVPERS 18068F Vol II, 2026-07 edition
Supports: Network systems security assessment and certification, Network risk identification and activity monitoring, Security policy enforcement for network environments, Information Security Engineers (O*NET 15-1299.05), Computer Network Support Specialists (O*NET 15-1231.00)
O*NET: Information Security Engineers
[2] O*NET 30.3 occupational data
Supports: Information Security Engineers (O*NET 15-1299.05)
O*NET: Computer Network Support Specialists
[3] O*NET 30.3 occupational data
Supports: Computer Network Support Specialists (O*NET 15-1231.00)

Defense contractor jobs for C27D

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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