Choose high school courses focusing on "automotive repair, electronics, English, mathematics, and physics," recommends BLS. Automotive repair classes, for example, introduce students to basic tools and equipment, including car jacks, pliers and automated diagnostic devices. English courses provide students with interpersonal and comprehension skills -- necessary for customer communications and data analysis.
Enroll in a two-year associate's degree or vocational program concentrating on a major related to diesel engine repair and maintenance. Vocational program certifications may take between six months to two years. Many programs require students to work at least 30 hours per week in hands-on training and practical instruction. Students in the Alfred State University diesel technician program, for example, will achieve universal training requirements that meet the Association of Diesel Specialists standards. ADS standards indicate to an employer that an applicant is professionally ready to work as a diesel pump technician.
Apply to auto body repair companies, preferably with a recommendation from a college or vocational school adviser. Employers are interested in graduates from trade programs and recipients of National Institute for Automotive Service Excellence. ASE honors are provided to many students graduating from academic or professional programs and indicate an applicant's expertise in diesel engine repair. New graduates and career professionals are also wise to present employers with portfolios describing experience in diesel technician course work, hands-on experience and certifications.