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Navy NEC · Engineering

Q33B SSN 774 Diesel Engine (Caterpiller) Maintenance Technician

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

An SSN 774 diesel engine maintenance technician performs preventive, organizational, and intermediate maintenance on Caterpillar diesel engines and their components. This technician takes readings, makes operating and repair adjustments, and performs shipboard lubricant oil, trend, and water analysis duties.

Minimum clearance: Secret

Core Skills

  • Lubricating oil, water, and trend analysis
  • Diesel governor and injector maintenance
  • Starting air and scavenging air system maintenance
  • Engine readings and operating adjustments

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.

Bus and Truck Mechanics and Diesel Engine Specialists

Maintaining Caterpillar diesel engine components and using engine readings to make operating and repair adjustments transfers directly to civilian diesel engine service.

How to prepare: Complete hands-on truck diesel diagnostic training that includes practice with Cummins INSITE to bridge from shipboard engines to vehicle applications.

What the civilian work involves
  • Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists.
  • Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
Civilian tools and software (examples)
  • Cummins INSITE

Notes & Sources

Evidence for this guidance (2 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC Q33B

    [1] NEC entry "Q33B - SSN 774 Diesel Engine (Caterpiller) Maintenance Technician"; cached text line 10085; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Lubricating oil, water, and trend analysis, Diesel governor and injector maintenance, Starting air and scavenging air system maintenance, Engine readings and operating adjustments, Bus and Truck Mechanics and Diesel Engine Specialists (O*NET 49-3031.00)

  2. O*NET: Bus and Truck Mechanics and Diesel Engine Specialists

    [2] O*NET 30.3 occupational data

    Supports: Bus and Truck Mechanics and Diesel Engine Specialists (O*NET 49-3031.00)

Defense contractor jobs for Q33B

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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