mos.directory

Army MOS · Engineering

120A Construction Engineering Technician

Current service use not established

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

Browse Army

Overview

A Construction Engineering Technician provides construction, survey and design, and electrical engineering expertise. The technician applies this expertise across a broad spectrum of engineer operations in various units.

Minimum clearance: Secret

Core Skills

  • Survey and engineering design expertise
  • Electrical engineering support for engineer operations

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.

Civil Engineering Technologists and Technicians

Military construction, survey, and design experience transfers to civilian site analysis and engineering drawing support.

How to prepare: Build a sample site-design portfolio in Autodesk AutoCAD Civil 3D that includes a dimensional layout and material quantity calculations.

What the civilian work involves
  • Calculate dimensions, square footage, profile and component specifications, and material quantities, using calculator or computer.
  • Draft detailed dimensional drawings and design layouts for projects to ensure conformance to specifications.
  • Analyze proposed site factors and design maps, graphs, tracings, and diagrams to illustrate findings.
Civilian tools and software (examples)
  • Autodesk AutoCAD Civil 3D
  • Microsoft Excel

Electrical and Electronics Drafters

Military electrical engineering and design expertise provides a foundation for preparing civilian electrical construction drawings.

How to prepare: Practice producing an electrical drawing set in Autodesk AutoCAD, including wiring diagrams and installation details, for review by an electrical design professional.

What the civilian work involves
  • Draft working drawings, wiring diagrams, wiring connection specifications, or cross-sections of underground cables, as required for instructions to installation crew.
  • Assemble documentation packages and produce drawing sets to be checked by an engineer or an architect.
  • Consult with engineers to discuss or interpret design concepts, or determine requirements of detailed working drawings.
Civilian tools and software (examples)
  • Autodesk AutoCAD
  • Autodesk Revit

Notes & Sources

Evidence for this guidance (3 documents)
  1. Army COOL MOC feed: 120A Construction Engineering Technician

    [1] data/authority/army-codes.json entry 120A (OSD COOL feed, fetched 2026-07-25); DB rank warrant_officer, authority codeType warrant_officer

    Supports: Survey and engineering design expertise, Electrical engineering support for engineer operations, Civil Engineering Technologists and Technicians (O*NET 17-3022.00), Electrical and Electronics Drafters (O*NET 17-3012.00)

  2. O*NET: Civil Engineering Technologists and Technicians

    [2] O*NET 30.3 occupational data

    Supports: Civil Engineering Technologists and Technicians (O*NET 17-3022.00)

  3. O*NET: Electrical and Electronics Drafters

    [3] O*NET 30.3 occupational data

    Supports: Electrical and Electronics Drafters (O*NET 17-3012.00)

Defense contractor jobs for 120A

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

Report an error on this page