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Navy NEC · Engineering

U33B Navy Afloat Maintenance Training Strategy (NAMTS) Computer Numerical Controller (CNC) Machinist

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 NAMTS Computer Numerical Controller Machinist performs operational and intermediate-level maintenance involving CNC lathes, milling machines, and associated equipment. The machinist uses Computer Aided Design and Computer Aided Machining software while following repair standards, quality assurance specifications, and proper industrial machinery procedures.

Core Skills

  • CAD and CAM use in maintenance
  • Operational and intermediate-level CNC maintenance
  • Machinery repair standards and quality assurance

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.

Machinists

Experience applying CNC lathes and milling machines in maintenance work, with knowledge of repair standards and quality assurance specifications, transfers to precision machining.

How to prepare: Complete a supervised machining project that documents machine setup, a finished part, and dimensional inspection against specifications.

What the civilian work involves
  • Machine parts to specifications, using machine tools, such as lathes, milling machines, shapers, or grinders.
  • Measure, examine, or test completed units to check for defects and ensure conformance to specifications, using precision instruments, such as micrometers.
  • Set up, adjust, or operate basic or specialized machine tools used to perform precision machining operations.
Civilian tools and software (examples)
  • Autodesk AutoCAD
  • Dassault Systemes SolidWorks

Computer Numerically Controlled Tool Programmers

Military use of CAD and CAM software with CNC lathes and milling machines provides a foundation for developing and verifying machining programs.

How to prepare: Build a sample CNC programming project with an operation sequence, cutting-tool selections, and a simulated trial run checked against part specifications.

What the civilian work involves
  • Determine the sequence of machine operations, and select the proper cutting tools needed to machine workpieces into the desired shapes.
  • Observe machines on trial runs or conduct computer simulations to ensure that programs and machinery will function properly and produce items that meet specifications.
  • Determine reference points, machine cutting paths, or hole locations, and compute angular and linear dimensions, radii, and curvatures.
Civilian tools and software (examples)
  • Autodesk AutoCAD
  • Dassault Systemes SolidWorks

Notes & Sources

Evidence for this guidance (3 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC U33B

    [1] NEC entry "U33B - Navy Afloat Maintenance Training Strategy (NAMTS) Computer Numerical Controller (CNC) Machinist"; cached text line 11836; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: CAD and CAM use in maintenance, Operational and intermediate-level CNC maintenance, Machinery repair standards and quality assurance, Machinists (O*NET 51-4041.00), Computer Numerically Controlled Tool Programmers (O*NET 51-9162.00)

  2. O*NET: Machinists

    [2] O*NET 30.3 occupational data

    Supports: Machinists (O*NET 51-4041.00)

  3. O*NET: Computer Numerically Controlled Tool Programmers

    [3] O*NET 30.3 occupational data

    Supports: Computer Numerically Controlled Tool Programmers (O*NET 51-9162.00)

Defense contractor jobs for U33B

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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