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Navy NEC · Engineering

721B General Dynamics (GD) Littoral Combat Ship (LCS) Core Crew Mission Specialist

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 General Dynamics Littoral Combat Ship Core Crew Mission Specialist operates equipment in the General Dynamics Systems Suite aboard Littoral Combat Ships. The specialist performs organizational level preventive and corrective maintenance, troubleshooting, and fault isolation on suite equipment.

Core Skills

  • Organizational-level preventive and corrective maintenance
  • Shipboard equipment troubleshooting and fault isolation

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.

Maintenance and Repair Workers, General

Organizational-level maintenance and fault isolation on the unspecified GD Systems Suite provide a foundation for general maintenance work.

How to prepare: Build on that foundation through supervised, employer-specific equipment practice in malfunction diagnosis and routine maintenance of motors, drives, belts, and filters.

What the civilian work involves
  • Inspect, operate, or test machinery or equipment to diagnose machine malfunctions.
  • Perform routine maintenance, such as inspecting drives, motors, or belts, checking fluid levels, replacing filters, or doing other preventive maintenance actions.

Notes & Sources

Evidence for this guidance (2 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC 721B

    [1] NEC entry "721B - General Dynamics (GD) Littoral Combat Ship (LCS) Core Crew Mission Specialist"; cached text line 17026; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Organizational-level preventive and corrective maintenance, Shipboard equipment troubleshooting and fault isolation, Maintenance and Repair Workers, General (O*NET 49-9071.00)

  2. O*NET: Maintenance and Repair Workers, General

    [2] O*NET 30.3 occupational data

    Supports: Maintenance and Repair Workers, General (O*NET 49-9071.00)

Defense contractor jobs for 721B

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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