Diesel Mechanic, Sr. performs inspection, maintenance, repairs, and overhauls of diesel engines. Troubleshoots and diagnoses problems. Being a Diesel Mechanic, Sr. utilizes computer electronics systems to interpret failure modes. Replaces and/or refurbishes parts. Additionally, Diesel Mechanic, Sr. maintains maintenance logs according to requirements. Ensures services provided follow all quality standards and safety procedures. May perform DOT annual inspections on vehicles. Typically requires a high school diploma or equivalent. Typically requires a Class A CDL license. Typically reports to a supervisor or manager. The Diesel Mechanic, Sr. works independently within established procedures associated with the specific job function. Has gained proficiency in multiple competencies relevant to the job. To be a Diesel Mechanic, Sr. typically requires 3-5 years of related experience, or may need 2 years experience with additional specialized training and/or certification.