Entry-Level Diesel Mechanic Resume Example

This is the entry-level version of our diesel mechanic resume examples. Copy the structure, swap in your own numbers, then tailor it to the posting you are applying for.

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Diesel Mechanic Resume Template (entry level)

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Professional Summary

Entry-level Diesel Mechanic and recent diesel technology graduate with hands-on experience in preventive maintenance, air brake service, and diagnostic scan tools. Dependable, safety-focused, and eager to build toward ASE certification.

Professional Experience

Diesel MechanicAug 2025 - Present

Front Range Fleet Services, Denver, CO

Performed PM-A and PM-B services including oil, fuel filter, and DEF filter changes on 10 to 12 trucks per week under journeyman sign-off.
Diagnosed fault codes with Cummins INSITE and Cat ET and cleared active DPF regens on Class 8 tractors.
Serviced S-cam air brake systems and documented defects for DOT inspections, passing all follow-up brake checks.

Skills

Preventive Maintenance, Air Brake Systems, Cummins INSITE, Cat ET, DPF Regen, Fuel Systems, DOT Inspection, Electrical Diagnostics

Education

Diesel Technology CertificateMay 2025

Universal Technical Institute (UTI)

High School DiplomaJun 2023

Adams City High School

Certifications

CDL Class B
EPA 609 Certification
ASE T4 Brakes (in progress)

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What changes at the entry level

This sample with a most recent title of Diesel Mechanic, across 1 role and 3 certifications. Skills that appear at this level and not in the mid level or senior level samples: Preventive Maintenance, Cat ET, DPF Regen. Every level lists Air Brake Systems, DOT Inspection, so those are table stakes for diesel mechanic roles rather than differentiators.

Compared with the mid level sample
Journeyman Diesel Mechanic with strong hands-on experience overhauling Cummins and Detroit engines, diagnosing aftertreatment and fuel systems, and maintaining fleet uptime. Known for fast, clean turnaround and low comeback rates.
Compared with the senior level sample
Senior Diesel Mechanic and shop lead with a decade of experience overhauling heavy-truck engines, running PM programs, and driving fleet uptime. Mentors apprentices toward ASE certification and holds shops to DOT and FMCSA compliance.
Adds: Shop Leadership, PM Program Management, Warranty Administration.

Key Skills for Diesel Mechanic

Preventive MaintenanceAir Brake SystemsCummins INSITECat ETDPF RegenFuel SystemsDOT InspectionElectrical Diagnostics

ATS Keywords for Diesel Mechanic

Use these naturally in your summary, skills, and experience when they reflect your background.

Diesel MechanicPreventive MaintenanceCummins INSITECat ETAir Brake SystemsDPF RegenFuel InjectorsDOT InspectionASE T-seriesCDL Class Adiesel technologydiagnostic scan tools

How to Write an Entry Level Diesel Mechanic Resume

An entry-level diesel mechanic resume should prove you can safely complete real shop work, not just pass a program. Anchor it in preventive maintenance, brake service, and diagnostics using Cummins INSITE and Cat ET, plus any air brake, DPF, or DOT inspection exposure from training or a first job.

Resume Writing Tips

Name the tools and platforms you trained on

List the scan tools and engine platforms you actually used, such as Cat ET, Cummins INSITE, and DD15 training units. ATS software matches exact terms, so a named tool tied to a fault-code job beats a generic diagnostics line.

Translate program work into shop language

Reframe lab assignments as deliverables: instead of learned brake systems, write serviced S-cam air brakes and passed a follow-up DOT brake check. That reads like billable shop work, not classroom hours, and signals you can produce on day one.

Show clean, reliable turnaround

Entry candidates lack big rebuilds, so quantify volume and quality instead: PM services completed per week, comebacks avoided, or trucks returned to service per shift. A low comeback rate under journeyman sign-off signals you follow torque specs and procedures.

Skills to Highlight

Preventive Maintenance

Describe the PM tiers you performed, oil, fuel filter, and DEF filter changes, and a weekly volume, so a shop sees you can handle routine PM throughput without slowing the bay.

Diagnostic Scan Tools

Name the software you used to pull codes and read live data, such as Cummins INSITE or Cat ET, and one fault you diagnosed, rather than listing diagnostics as a bare skill.

Air Brake Systems

Cite a brake job you completed, S-cam adjustment or foundation brake replacement, and note that it passed a follow-up DOT inspection to prove safety-critical accuracy.

Aftertreatment / DPF

Mention clearing active DPF regens or basic SCR checks, showing you understand emissions systems that cause the derates fleets worry about most.

Common Questions

I just finished a diesel program with no shop job, what do I list?

List your program hands-on work like real experience: the engine platforms and scan tools you used, brake and PM jobs you completed, and any capstone repair. Hiring managers for entry roles expect training projects instead of years, so name the tools and outcomes concretely.

Do I need my ASE certifications before applying?

No, most entry roles let you certify on the job, but listing exams in progress like ASE T4 Brakes shows commitment. A CDL and EPA 609 help more early on, since they let you road-test trucks and legally handle refrigerant right away.

How detailed should my bullets be with limited experience?

Entry-level General Laborer resume sample showcasing realistic early-career experience, role-specific skills, and ATS-friendly formatting for 2026 applications.

Material HandlingSite CleanupHand and Power Tools

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