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Navy NEC · Engineering

780B Cummins and Steyr Diesel Engines 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

A Cummins and Steyr Diesel Engines Technician operates and maintains Cummins QSB5.9 and 6.7 engines and Steyr SE266RK40 engines. The technician performs organizational or extensive intermediate maintenance and overhaul on these engines and their associated auxiliary equipment.

Core Skills

  • Cummins QSB and Steyr SE266RK40 engine overhaul
  • Diesel engine auxiliary equipment maintenance

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

Organizational and intermediate maintenance and overhaul of Cummins and Steyr diesel engines transfer directly to civilian diesel engine service.

How to prepare: Complete hands-on training in Cummins INSITE diagnostics to complement your engine maintenance and overhaul experience.

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

  • Verified duties cover diesel engines and auxiliary equipment, not the brake, steering, or chassis work included in broader truck mechanic roles.
Evidence for this guidance (2 documents)
  1. NAVPERS 18068F Vol II (NEOCS, Jul 2026 edition): NEC 780B

    [1] NEC entry "780B - Cummins and Steyr Diesel Engines Technician"; cached text line 18736; NAVPERS 18068F Vol II, 2026-07 edition

    Supports: Cummins QSB and Steyr SE266RK40 engine overhaul, Diesel engine auxiliary equipment maintenance, 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 780B

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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