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Mechanical
Diesel Technician
Keep trucks, buses, and heavy equipment moving with diesel engine and drivetrain expertise.
What They Do
Diesel technicians service and rebuild engines, aftertreatment, air brakes, hydraulics, and electrical systems on heavy-duty vehicles and machines.
Where They Work
- Truck and equipment dealerships
- Fleet and transit maintenance shops
- Construction and mining equipment services
- Agricultural equipment dealers
Skills Needed
- Hydraulics and pneumatics
- Electrical diagnostics
- Mechanical aptitude
- Documentation and diagnostics software
Typical Training Path
Diesel technology programs run 1–2 years; many technicians also learn through employer apprenticeships and manufacturer training.
Apprenticeship Opportunities
Dealer and fleet apprenticeships are widely available; some include tool allowances and tuition support.
Certifications
- ASE Medium/Heavy Truck (T-series)
- CDL Class A/B
- Manufacturer engine certifications
- OSHA 10
Career Advancement
- Technician → Lead tech → Shop foreman
- Field service technician
- Service manager
- Mobile repair business owner
Typical Work Environment
Work varies by employer and project. Expect a mix of indoor and outdoor work, physical activity, teamwork, safety procedures, and problem solving.
How to Get Started
- Finish high school or earn a GED — most programs require it.
- Build your math, measurement, and mechanical basics with our free test-prep resources.
- Talk with a mentor or tradesperson about a typical day on the job.
- Apply to an apprenticeship, trade school, or entry-level helper position.
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