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Army MOS · Engineering

140L Air and Missile Defense (AMD) Systems Technician

Current service use not established

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

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Overview

An air and missile defense systems technician plans and supervises maintenance and logistical activities within an air and missile defense unit. The technician monitors systems and support equipment, diagnoses or repairs malfunctions, manages special tools and maintenance records, and advises commanders on technical considerations.

Minimum clearance: Secret, often with SCI exposure

Core Skills

  • Operator error and equipment fault diagnosis
  • Maintenance program effectiveness evaluation
  • System modification installation coordination
  • Special tool and support equipment oversight

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.

First-Line Supervisors of Mechanics, Installers, and Repairers

Planning AMD maintenance, evaluating maintenance programs, and coaching technicians transfer directly to supervising equipment repair teams.

How to prepare: Build a sample civilian maintenance plan showing work assignments, equipment inspections, safety checks, and repair quality reviews.

What the civilian work involves
  • Inspect, test, and measure completed work, using devices such as hand tools or gauges to verify conformance to standards or repair requirements.
  • Inspect and monitor work areas, examine tools and equipment, and provide employee safety training to prevent, detect, and correct unsafe conditions or violations of procedures and safety rules.
  • Monitor employees' work levels and review work performance.
Civilian tools and software (examples)
  • Microsoft Excel
  • Microsoft Project

Electrical and Electronics Repairers, Commercial and Industrial Equipment

Diagnosing and repairing AMD system malfunctions, overseeing maintenance records, and coordinating equipment modifications transfer to industrial electronics repair.

How to prepare: Complete a hands-on industrial electronics troubleshooting course focused on equipment testing and documenting repairs in a computerized maintenance management system.

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.
  • Maintain equipment logs that record performance problems, repairs, calibrations, or tests.
  • Install repaired equipment in various settings, such as industrial or military establishments.
Civilian tools and software (examples)
  • Circuit evaluation software
  • Computerized maintenance management system CMMS

Training & Development

Choose credentials for your target role. COOL funding markers describe program listings, not a guarantee of eligibility or funding.

Getting Started

  • Associate Electronics Technician (CETa)

    Provide a foundational electronics credential if a knowledge review identifies gaps; the program is designed for technicians with less than two years of electronics experience or training.

    For: Electrical and Electronics Repairers, Commercial and Industrial Equipment

Career Growth

  • Certified Maintenance and Reliability Professionals (CMRP)

    Document maintenance and reliability knowledge for civilian maintenance supervision.

    Eligibility and preparation: No education or work-experience minimum; candidates must not have sat for the exam within the preceding six months.

    For: First-Line Supervisors of Mechanics, Installers, and Repairers

Notes & Sources

Evidence for this guidance (6 documents)
  1. Army COOL MOC feed: 140L Air and Missile Defense (AMD) Systems Technician

    [1] data/authority/army-codes.json entry 140L (OSD COOL feed, fetched 2026-07-25); DB rank warrant_officer, authority codeType warrant_officer

    Supports: Operator error and equipment fault diagnosis, Maintenance program effectiveness evaluation, System modification installation coordination, Special tool and support equipment oversight, First-Line Supervisors of Mechanics, Installers, and Repairers (O*NET 49-1011.00), Electrical and Electronics Repairers, Commercial and Industrial Equipment (O*NET 49-2094.00)

  2. O*NET: First-Line Supervisors of Mechanics, Installers, and Repairers

    [2] O*NET 30.3 occupational data

    Supports: First-Line Supervisors of Mechanics, Installers, and Repairers (O*NET 49-1011.00)

  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)

  4. COOL credential mapping: Certified Maintenance and Reliability Professionals (CMRP)

    [4] 140L cached COOL credential feed

    Supports: Certified Maintenance and Reliability Professionals (CMRP)

  5. Society for Maintenance and Reliability Professionals: CMRP eligibility

    [5] Eligibility; retrieved 23 September 2026

    Supports: Certified Maintenance and Reliability Professionals (CMRP)

  6. COOL credential mapping: Associate Electronics Technician (CETa)

    [6] 140L cached COOL credential feed

    Supports: Associate Electronics Technician (CETa)

    [7]ETA International: Associate Certified Electronics Technician · CETa description and CETa Exam Info; retrieved 2026-09-23

    Supports: Associate Electronics Technician (CETa)

Defense contractor jobs for 140L

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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