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Army MOS · Logistics

91D Tactical Power Generation Specialist

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

A Tactical Power Generation Specialist supervises operations and performs field level maintenance on power generation equipment, internal combustion engines, and associated equipment rated up to 200 kilowatts. The specialist overhauls but does not rebuild this equipment and does not maintain turbine engine driven generators.

Minimum ASVAB: GM 93

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: smartbook-611-21-ch10c-fy2025 (source date 2025-12). Policy applicability has not been established.

See if you would hit this score: free ASVAB practice test

Core Skills

  • Field maintenance of generators through 200 kW
  • Internal combustion engine and associated equipment overhaul

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.

Onsite Generator Technician

Field-level maintenance of power generation equipment and internal combustion engines transfers directly to servicing onsite generator sets.

How to prepare: Use the EGSA study guide to identify gaps in civilian generator installation, electrical systems, and controls before choosing targeted training.

What the civilian work involves
  • Install, maintain, service, and repair onsite power generation systems.
  • Troubleshoot mechanical, electrical, and control systems in generator sets.

Training & Development

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

Career Growth

  • Electrical Generator Systems Technician Certification - Journeyman

    Demonstrate advanced knowledge of onsite generator installation, maintenance, troubleshooting, and repair.

    Eligibility and preparation: The Journeyman exam requires at least three years of experience as an electrical power generator equipment technician; the preparation bootcamp's lack of prerequisites does not waive this requirement.

    For: Onsite Generator Technician

Notes & Sources

  • Verified military duties exclude turbine-driven generators and cover overhaul, not rebuild.
Evidence for this guidance (3 documents)
  1. Army COOL MOC feed: 91D Tactical Power Generation Specialist

    [1] data/authority/army-codes.json entry 91D (OSD COOL feed, fetched 2026-07-25); DB rank enlisted, authority codeType enlisted

    Supports: Field maintenance of generators through 200 kW, Internal combustion engine and associated equipment overhaul, Onsite Generator Technician

  2. Electrical Generating Systems Association: Generator Technician Certification

    [2] Program overview, Journeyman Technician Certification, and Test Preparation; rendered 23 September 2026

    Supports: Onsite Generator Technician, Electrical Generator Systems Technician Certification - Journeyman

    [3]COOL credential mapping: Electrical Generator Systems Technician Certification - Journeyman · 91D cached COOL credential feed

    Supports: Electrical Generator Systems Technician Certification - Journeyman

  3. Electrical Generating Systems Association: Technician Certification FAQs

    [4] Who may take the EGSA Certification Exam? Journeyman-Level Certification; How do I become certified?; rendered 23 September 2026

    Supports: Electrical Generator Systems Technician Certification - Journeyman

Defense contractor jobs for 91D

Predecessor codes

Historical codes with documented links to 91D. Each history page explains the change.

52D1Power-Generation Equipment Repairer52D2Power-Generation Equipment Repairer52D3Power-Generation Equipment Repairer

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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