Senior LevelDiesel Mechanic Resume Example

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Diesel Mechanic Resume Template (senior level)

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Professional Summary

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.

Professional Experience

Lead Diesel Technician / Shop ForemanJan 2021 - Present

Cascade Heavy Truck Center, Portland, OR

Led a 6-person shift, assigning work orders and verifying repairs while keeping bay throughput at 40-plus units per week.
Redesigned the PM scheduling program in the fleet management system, lifting on-time PM completion from 82% to 98% and cutting roadside breakdowns 25%.
Mentored 4 apprentice technicians through their first ASE T-series exams, raising first-time pass rate and reducing their comebacks.

Diesel TechnicianAug 2016 - Dec 2020

Willamette Fleet Solutions, Salem, OR

Overhauled Cummins ISX, Detroit DD15, and Cat C15 engines to OEM torque specs with zero warranty comebacks over 18 months.
Processed OEM warranty claims on Cummins and Detroit powertrains at a 94% approval rate through detailed failure documentation.
Diagnosed aftertreatment and fuel-system faults with JPRO and INSITE, maintaining 97% uptime across 85 tractors.

Diesel Mechanic ApprenticeJun 2014 - Jul 2016

Columbia Diesel Repair, Vancouver, WA

Assisted journeyman technicians on engine teardowns and reassembly, torquing head bolts and main caps to spec across 20-plus in-frame jobs.
Serviced S-cam air brakes and completed PM services on Class 8 tractors under mentor sign-off.
Traced electrical faults with a multimeter and OEM wiring diagrams, resolving intermittent no-start conditions.

Skills

Engine Overhaul, Aftertreatment Diagnostics, JPRO, Shop Leadership, PM Program Management, Air Brake Systems, DOT Inspection, Warranty Administration

Education

A.A.S. Diesel TechnologyMay 2014

Portland Community College

High School DiplomaJun 2012

Fort Vancouver High School

Certifications

ASE Master Medium/Heavy Truck
ASE T2 Diesel Engines
ASE T4 Brakes
ASE T6 Electrical/Electronic Systems
ASE T8 Preventive Maintenance Inspection
EPA 609 Certification
CDL Class A
Federal DOT/FMCSA Inspector

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Key Skills for Diesel Mechanic

Engine OverhaulAftertreatment DiagnosticsJPROShop LeadershipPM Program ManagementAir Brake SystemsDOT InspectionWarranty Administration

ATS Keywords for Diesel Mechanic

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

Diesel MechanicShop ForemanEngine OverhaulCummins ISXDetroit DD15JPROAftertreatment DPF SCRAir Brake SystemsDOT InspectionASE Master Medium/Heavy Truckfleet uptimePM scheduling

How to Write a Senior Level Diesel Mechanic Resume

At the senior level, a diesel mechanic resume has to prove shop leadership and multiplier impact: PM programs you redesigned, apprentices you mentored toward ASE certification, and fleet uptime you drove across a named fleet, not just another list of engines you can rebuild. Show you make the whole shop faster and more compliant.

Resume Writing Tips

Lead with program and process wins

Describe a system you improved, like redesigning PM scheduling in the fleet management software, and the before-and-after: PM on-time completion up from 82% to 98% and roadside breakdowns down 25%. Process wins prove impact beyond your own toolbox.

Quantify your mentoring and team scope

State how many technicians you led or apprentices you mentored, and an outcome like first-time ASE pass rate or reduced comebacks. A foreman is judged on the team's output and quality, not just personal wrench time.

Show compliance ownership

Describe how you hold a shop to DOT and FMCSA standards, red-tagging out-of-service defects, verifying safety-critical repairs, and maintaining a clean audit record. Naming a DOT inspector credential reinforces that you shield the company from violations.

Skills to Highlight

Shop Leadership

Detail the shift size you led, how you assigned and verified work orders, and the weekly throughput you sustained, showing you keep a full bay productive, not just your own.

PM Program Management

Describe a PM program you owned in the fleet system and the on-time completion and breakdown-reduction numbers that resulted, proving you manage reliability at the fleet level.

Mentoring & Certification

Cite apprentices you guided through ASE T-series exams and the pass-rate or comeback outcome, demonstrating you raise the whole team's skill, not just deliver personal repairs.

Warranty & Compliance

Explain your warranty approval rate and how you enforce DOT and FMCSA compliance, showing you protect both the shop's revenue and its audit standing.

Common Questions

How do I prove leadership if my title is technician, not foreman?

Titles lag scope, so describe the scope directly: shifts you ran when the foreman was out, apprentices you mentored, work orders you verified, and PM or process improvements you drove. Employers weigh demonstrated impact, throughput, uptime, and pass rates, over the exact label on your badge.

Should a senior mechanic still list hands-on engine work?

Yes, but frame it around judgment and outcomes: name the platforms you overhauled, the comeback-free window you achieved, and the warranty approval rate you documented. Then layer leadership on top, mentoring counts, PM program gains, so the resume shows you still turn wrenches and multiply the team.

How many ASE certifications should a senior mechanic list?

Senior Carpenter and Foreman resume example. Focus on crew leadership, project scheduling, code compliance, and complex structural builds.

Crew LeadershipProject SchedulingBuilding Codes

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