Diesel Mechanic job description.
A Diesel Mechanic diagnoses, repairs, and maintains diesel-powered engines and equipment such as trucks, buses, and heavy machinery. They perform preventive maintenance, troubleshoot mechanical and electrical faults, and ensure vehicles meet safety and regulatory standards.
The Diesel Mechanic job description · $29
The full editable .docx — role summary, 8 worked responsibilities, qualifications, and skills, formatted for your letterhead. Delivered to your inbox within 24 hours — usually instantly.
Role: Diesel Mechanic Reports to: Fleet Maintenance Manager or Shop Foreman
A Diesel Mechanic diagnoses, repairs, and maintains diesel-powered engines and equipment such as trucks, buses, and heavy machinery. They perform preventive maintenance, troubleshoot mechanical and electrical faults, and ensure vehicles meet safety and regulatory standards.
- Diagnose mechanical, electrical, and hydraulic issues in diesel engines
- Perform scheduled preventive maintenance on trucks and heavy equipment
- Repair or replace worn engine, transmission, and brake components
What's inside the document.
One-paragraph plain-English explanation of the role's outcome and scope.
8 responsibilities phrased the way the work is actually done.
4 qualifications a candidate must have to perform on day 30.
3 qualifications that would make a candidate excellent in year two.
6 skill chips you can copy directly into your ATS.
Fleet Maintenance Manager or Shop Foreman
A complete document set.
- Word document (.docx) — fully editable
- PDF — signature-ready
- Google Docs — one-click copy to your Drive
- 12 months of updates to this document
- Commercial-use licence for internal and client work
The work, not the title.
- Diagnose mechanical, electrical, and hydraulic issues in diesel engines
- Perform scheduled preventive maintenance on trucks and heavy equipment
- Repair or replace worn engine, transmission, and brake components
- Read and interpret diagnostic codes using computerized testing equipment
- Conduct pre- and post-trip inspections to verify roadworthiness
- Maintain accurate repair records and parts usage logs
- Ensure repairs comply with DOT and manufacturer safety standards
- Weld or fabricate replacement parts when needed
Required — and what would make a candidate excellent.
- High school diploma or equivalent; diesel technology certificate preferred
- 2+ years hands-on diesel engine repair experience
- Proficiency with diagnostic scan tools and hand/power tools
- Valid driver's licence; CDL a plus
- ASE certification in diesel engines or related specialty
- Experience with specific OEM equipment (e.g. Cummins, Detroit Diesel)
- Welding or fabrication experience
Eight steps from download to publish.
- 01Open the Diesel Mechanic job description in Word or your one-click Google Docs copy.
- 02Replace placeholders for company name, reporting line, and location with your specifics.
- 03Tighten the summary to one paragraph that names the team's outcome, not just the role.
- 04Edit the responsibilities to match the actual scope of the seat — aim for 6 to 8 items, not 12.
- 05Separate required qualifications from preferred. Required is what a candidate must have to do the work on day 30; preferred is what would make them excellent in year two.
- 06Add salary range guidance using BLS, Payscale, or your own band data — do not copy generic figures.
- 07Have the hiring manager and one peer read it. Cut anything that wouldn't survive a candidate question.
- 08Publish to your ATS, intranet, and external careers page.
The right document at the right moment.
Use this Diesel Mechanic job description any time you are opening or reopening a seat at this level. The mid band sets the calibration — copy the document, tighten it to your specific scope, and circulate to the hiring panel before the first interview.
The reporting line (Fleet Maintenance Manager or Shop Foreman) and skills list are starting points. Override either if your org structure or stack differs from the norm — the template is a draft, not a contract.
Honest answers before you download.
- What certifications should a diesel mechanic candidate have?
- ASE certification in diesel engines is the most recognized credential, though many employers accept vocational training plus verified hands-on experience.
- Is a CDL required for this role?
- Not always, but a CDL is valuable if the mechanic will road-test repaired vehicles, so many employers list it as preferred rather than mandatory.
Other documents in this neighbourhood.
Diesel Technician
A Diesel Technician inspects, services, and repairs diesel engines and related systems in trucks, buses, and heavy equipment.
Auto Mechanic
An auto mechanic diagnoses, repairs, and maintains vehicles to keep them operating safely and efficiently.
Fleet Manager
A fleet manager oversees an organization's vehicle fleet, ensuring vehicles are maintained, compliant, and available to support operations.
This Diesel Mechanic job description is a professionally drafted starting point for your hiring process and is not legal advice. Hiring practice varies by jurisdiction (e.g. pay-transparency laws differ across US states and AU jurisdictions). Adapt this document for your specific location and have employment counsel review any clauses you add before publishing. Salary varies by region, employer type, and experience. Reference BLS or current industry surveys for ranges. Full disclaimer.