A bus and truck mechanic inspects, diagnoses, and repairs the engines and systems that keep commercial vehicles on the road. It is hands-on, in demand, and you can start with a certificate. Here is what the work involves, what it takes, and how to get in.
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You repair and maintain diesel engines, transmissions, brakes, and electrical systems on buses, trucks, and other large vehicles. Your day involves inspecting equipment for wear and damage, identifying what is broken, and fixing mechanical and electronic components. You operate diagnostic tools and test-drive vehicles to verify repairs work correctly. You also need to stay current on safety protocols and regulations that govern commercial transportation. This work requires precision, problem-solving, and the ability to work independently or as part of a maintenance team.
Core work activities
Career video courtesy of CareerOneStop.
Bus and Truck Mechanics and Diesel Engine Specialists earn a median of $61,770 a year, based on 2025 data from the U.S. Bureau of Labor Statistics. Pay rises with experience, specialty, and location.
The outlook is modest. Employment is projected to grow 2 percent from 2024 to 2034, little or no change for all occupations, with about 26,500 openings a year.
Top skills
Knowledge areas
Most positions require a certificate in diesel mechanics or bus and truck repair, which you can earn through vocational or technical programs. These programs typically cover engine theory, hydraulics, electrical systems, and hands-on repair work. Some people enter the field through on-the-job training with an experienced mechanic while pursuing formal credentials. You will need strong mechanical knowledge, math skills for diagnostics, and the ability to read technical manuals and blueprints. Job Zone 3 preparation means you should expect moderate complexity in both learning and the work itself.
Most paths into this career start with a certificate program, though some combine classroom learning with apprenticeship. If you are deciding between programs or trying to map out your next steps, Pathly can map the bus and truck mechanic and diesel engine specialist path that fits you to build a plan with your counselor.
You do not need a license to work as a bus and truck mechanic and diesel engine specialist, but professional certifications can strengthen your resume.
Common certifications
You are drawn to hands-on work with machines and systems. You like solving practical problems, thinking critically about what is broken, and using tools and equipment to fix things.
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Last updated July 1, 2026.
Data sources. Career details from the O*NET 30.3 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA), used under CC BY 4.0. O*NET® is a trademark of USDOL/ETA. Salary and outlook figures from the U.S. Bureau of Labor Statistics (May 2025 wages; 2024–2034 projections), delivered via the CareerOneStop API. Certification, licensing, wage, and outlook data from CareerOneStop, sponsored by USDOL/ETA and the Minnesota Department of Employment and Economic Development (DEED).