Transportation
Diesel Technician
Diesel technicians are hands-on problem solvers who enjoy working on heavy trucks, buses, and large engines. This role suits mechanically inclined people who like diagnosing tough issues and keeping vehicles running reliably. You should be detail-oriented, physically capable, and safety-minded. No college degree is required. It’s a strong choice for job seekers seeking stable, high-demand work with excellent pay in the transportation industry.
Median wage
$29.7/hr
Physical demands
high
Drug test
Yes
National wages & job outlook
National figures for Bus and Truck Mechanics and Diesel Engine Specialists, shown as published by the source below.
Entry (10th–25th pct)
$21.41–$24.3/hr
Median
$29.7/hr
Experienced (75th–90th pct)
$36.29–$42.66/hr
Projected openings / year
26,500
+2% growth, 2024–2034
Wage data: 2025. National figures; local pay varies.
Source: CareerOneStop (careeronestop.org), sponsored by the U.S. Department of Labor, Employment & Training Administration (DOLETA), and the Minnesota Department of Employment & Economic Development (DEED).
Starting requirements
- High school diploma or GED
- Strong mechanical aptitude and tool skills
- Valid driver’s license (often CDL helpful)
- Good physical condition for lifting
- Willingness to earn manufacturer or ASE certifications
Training structure
Training options include 6 to 24-month trade school programs or manufacturer-sponsored apprenticeships. You learn diesel engines, electrical systems, brakes, and diagnostics through hands-on work. Many employers provide paid training and help with certifications.
Top credentials
- ASE Medium/Heavy Truck
- EPA 609
- DOT Inspector Certification
- OSHA 10
Licenses & certifications
Licenses are state-specific and certifications vary by specialty. Look up the exact ones for this path in your state.
Open the license & certification finderAdvancement path
Entry: Diesel technician or apprentice
Mid-Level: Certified senior technician
Advanced: Lead technician, shop supervisor, fleet manager, or specialized roles
Certifications and experience can lead to higher earnings and leadership positions with strong job security.
Typical employers
Trucking fleets, dealerships, construction firms, transit agencies
A day in the life
You begin by reviewing repair orders and inspecting trucks or equipment. Your day involves diagnosing problems, performing maintenance, repairing engines, and testing fixes. The work is active and technical in a shop environment. You finish knowing you helped keep important vehicles safely on the road.