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Navy NEC · Engineering

B24A Advanced Utilitiesman

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. Part of the Utilitiesman rating

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Overview

The Advanced Utilitiesman operates water supply and treatment equipment, runs sewage treatment equipment, and installs water distribution and sewage systems. This utilitiesman maintains boilers, air conditioning, and refrigeration equipment and determines crew, equipment, material, and scheduling requirements.

Core Skills

  • Water treatment and sewage system operations
  • Boiler, air conditioning, and refrigeration maintenance
  • Crew sizing and utility resource planning
  • Critical path scheduling and arrow diagrams

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.

Water and Wastewater Treatment Plant and System Operators

Operating water treatment, water supply, and sewage treatment equipment transfers directly to civilian treatment-system operations.

How to prepare: Target supervised operator-trainee openings that combine long-term on-the-job training with state licensing preparation; entrants typically need a high-school diploma or equivalent. A state license is usually required, with levels and requirements varying by state, and interstate moves may require new examinations rather than automatic license recognition.

What the civilian work involves
  • Operate and adjust controls on equipment to purify and clarify water, process or dispose of sewage, and generate power.
  • Collect and test water and sewage samples, using test equipment and color analysis standards.
  • Inspect equipment or monitor operating conditions, meters, and gauges to determine load requirements and detect malfunctions.
Civilian tools and software (examples)
  • Data logging software
  • Database software

Stationary Engineers and Boiler Operators

Military boiler operation and maintenance provide direct overlap with operating civilian steam and heating equipment.

How to prepare: Document your boiler operating experience and equipment types and sizes, then compare that record with the license class used in your target city or state. Where licensing is required, applicants usually need qualifying experience and a written exam; license classes limit the equipment operated without supervision, and relocation may require another examination.

What the civilian work involves
  • Operate or tend stationary engines, boilers, and auxiliary equipment, such as pumps, compressors, or air-conditioning equipment, to supply and maintain steam or heat for buildings, marine vessels, or pneumatic tools.
  • Monitor boiler water, chemical, and fuel levels, and make adjustments to maintain required levels.
  • Observe and interpret readings on gauges, meters, and charts registering various aspects of boiler operation to ensure that boilers are operating properly.
Civilian tools and software (examples)
  • Building management system software

Heating, Air Conditioning, and Refrigeration Mechanics and Installers

Operating and maintaining military air conditioning and refrigeration equipment transfers to civilian HVAC service work.

How to prepare: Compare an HVAC apprenticeship with a six-month to two-year technical program to address gaps in your maintenance experience; a postsecondary nondegree award is typical, though some enter with less education, and lengthy on-the-job training follows. Covered refrigerant work requires an equipment-type-specific EPA-approved certification test through an approved organization, except for apprentices under close and continual certified supervision; some states and localities separately require trade licensing.

What the civilian work involves
  • Test electrical circuits or components for continuity, using electrical test equipment.
  • Discuss heating or cooling system malfunctions with users to isolate problems or to verify that repairs corrected malfunctions.
  • Study blueprints, design specifications, or manufacturers' recommendations to ascertain the configuration of heating or cooling equipment components and to ensure the proper installation of components.

Notes & Sources

  • HVAC employers and manufacturers may impose additional qualifications.
Evidence for this guidance (8 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC B24A

    [1] NEC entry "B24A - Advanced Utilitiesman"; cached text line 2467; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Water treatment and sewage system operations, Boiler, air conditioning, and refrigeration maintenance, Crew sizing and utility resource planning, Critical path scheduling and arrow diagrams, Water and Wastewater Treatment Plant and System Operators (O*NET 51-8031.00), Stationary Engineers and Boiler Operators (O*NET 51-8021.00), Heating, Air Conditioning, and Refrigeration Mechanics and Installers (O*NET 49-9021.00)

  2. O*NET: Water and Wastewater Treatment Plant and System Operators

    [2] O*NET 30.3 occupational data

    Supports: Water and Wastewater Treatment Plant and System Operators (O*NET 51-8031.00)

  3. Bureau of Labor Statistics: Water and Wastewater Treatment Plant and System Operators

    [3] How to Become; Training and Licenses; updated August 27, 2026

    Supports: Water and Wastewater Treatment Plant and System Operators (O*NET 51-8031.00)

  4. O*NET: Stationary Engineers and Boiler Operators

    [4] O*NET 30.3 occupational data

    Supports: Stationary Engineers and Boiler Operators (O*NET 51-8021.00)

  5. Bureau of Labor Statistics: Stationary Engineers and Boiler Operators

    [5] How to Become a Stationary Engineer or Boiler Operator; Licenses, Certifications, and Registrations; page dated 2026-08-27, retrieved 2026-09-23

    Supports: Stationary Engineers and Boiler Operators (O*NET 51-8021.00)

  6. O*NET: Heating, Air Conditioning, and Refrigeration Mechanics and Installers

    [6] O*NET 30.3 occupational data

    Supports: Heating, Air Conditioning, and Refrigeration Mechanics and Installers (O*NET 49-9021.00)

  7. Bureau of Labor Statistics: Heating, Air Conditioning, and Refrigeration Mechanics and Installers

    [7] How to Become; Education and Training; Licenses, Certifications, and Registrations; updated August 27, 2026

    Supports: Heating, Air Conditioning, and Refrigeration Mechanics and Installers (O*NET 49-9021.00)

  8. US EPA: Section 608 Technician Certification Requirements

    [8] Requirements and Types of Certifications; updated July 15, 2026

    Supports: Heating, Air Conditioning, and Refrigeration Mechanics and Installers (O*NET 49-9021.00)

Defense contractor jobs for B24A

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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