1
Obtain a High School Diploma or GED
A high school diploma or equivalent is typically required to begin a career as a diesel mechanic and to enroll in formal training programs.
Diesel Mechanic
UPDATED FOR 2025
Diesel mechanics specialize in the inspection, maintenance, and repair of diesel engines in vehicles such as trucks, buses, and construction equipment. They diagnose mechanical and electrical issues, perform preventative maintenance, and ensure diesel engines meet safety and environmental standards. Diesel mechanics are essential for the reliable operation of commercial fleets and heavy machinery.
To become a diesel mechanic in New Jersey, you typically need a high school diploma or GED, completion of a formal diesel mechanic training program, two years of work experience, and successful completion of ASE (Automotive Service Excellence) certification exams. A Commercial Driver's License (CDL) may also be required for test-driving large vehicles.
Step-by-Step Guide
2
Complete a Diesel Mechanic Training Program
Enroll in a formal diesel mechanic training program at a technical school or community college. These programs typically include classroom instruction and hands-on experience in diesel engine repair and diagnostics.
3
Gain Work Experience (2 Years Recommended)
Work as an entry-level diesel mechanic or apprentice for at least two years to gain hands-on experience with diesel engines and equipment.
4
Earn ASE Certification
Pass one or more ASE (Automotive Service Excellence) certification exams in Medium/Heavy Truck or Diesel Engines. Certification demonstrates your expertise and increases employability.
5
Obtain a Commercial Driver's License (CDL) (If Required)
Some employers require a Commercial Driver's License (CDL) to allow you to test-drive large trucks or buses. Check employer and state requirements.