Diesel Service Technician Jobs
Diesel Service Technician jobs are open across trucking, construction, agriculture, mining, and public transit, from entry-level lube technicians to senior diagnostic specialists, with common specializations in heavy-duty engines, hydraulic systems, and emissions compliance. Find a role that fits below and apply directly.
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LaCoe Trucking LLC is seeking an experienced, no-nonsense Heavy-Duty Service Manager / Operations Lead to run front-of-house operations at our commercial diesel facility in Kilgore, TX.
You will lead customer intake, heavy-duty service writing, repair estimating, and parts coordination while serving as the operational partner to our Shop Foreman. You must have command of commercial truck repair workflows, understand Class 7–8 component failures, and possess the backbone to enforce shop policies, manage scope expansions, and maintain clear boundaries with fleet accounts.
Key Responsibilities
- Service Writing & Estimating: Build accurate labor and parts estimates for heavy engine overhauls (Cummins, Detroit, PACCAR, CAT), emissions systems, driveline, electrical, and running gear using heavy-duty shop management software (Fullbay experience preferred).
- Scope Creep & Teardown Management: Act as the gatekeeper when latent mechanical failures are uncovered during teardowns. Ensure photos are uploaded, estimates are revised, and formal approvals are secured before further work proceeds.
- Dispatch & Intake Operations: Manage daily in-shop intake and roadside triage. Enforce mandatory dispatch policies, customer deposits, and labor minimums without hesitation.
- Shop Flow Partnership: Work directly alongside the Shop Foreman to prioritize the unassigned repair queue, balance heavy overhaul bays against fast-turn work, and keep active bays moving.
- Fleet & Customer Relations: Deliver proactive, stage-based progress updates on multi-day teardowns. De-escalate demanding fleet dispatchers and hold professional, firm boundaries.
- Administrative Oversight: Ensure every vendor invoice ties directly to a Service Order before approval, audit completed tickets for billed-hour accuracy, and coordinate return credits on cores and unused parts.
Qualifications & Requirements
- Industry Experience: Minimum 3–5 years in a commercial truck dealership or independent heavy-duty fleet repair facility as a Service Writer, Service Manager, or Lead Dispatcher. (Automotive-only applicants will not be considered).
- Technical Literacy: Deep understanding of commercial diesel platforms, Standard Repair Times (SRTs), out-of-frame/in-frame overhauls, and commercial brake/air systems.
- Software Competence: Experience with commercial shop platforms (Fullbay, Karmak, Procede, CDK) and general computer proficiency.
- Leadership & Boundary Control: Confident communication style capable of managing difficult customer conversations, defending technician billable time, and leading office personnel.
- Licensing: Valid Driver's License and clean background.
Benefits & Schedule
- Schedule: Monday – Friday, daytime operating hours.
- Compensation: Competitive weekly base ($1,800 – $2,250/week based on qualifications) with performance review milestones and production incentive opportunities.
Pay: $80,000.00 - $130,000.00 per year
Work Location: In person
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Find JobsDiesel Service Technician Job Market
Who's Hiring
- MHC Kenworth50
- The Larson21
- Cummins14
- Butler Machinery Company12
- Rush Enterprises9
Top Industries Hiring
- Manufacturing
- Chemicals & Materials
- Mining & Natural Resources
What Employers Look For
The qualifications that appear most often in diesel service technician jobs.
- ASE certification in medium/heavy truck or related diesel area preferred or required
- Hands-on experience diagnosing and repairing diesel engines, transmissions, and drivetrain components
- Proficiency with electronic diagnostic software such as Cummins INSITE or Detroit Diagnostic Link
- Valid commercial driver's license or ability to obtain one for road-testing repaired vehicles
- Vocational school diploma, trade school certificate, or associate degree in diesel technology
- Ownership of basic hand tools sufficient to perform diesel service and maintenance work
Tips for Your Diesel Service Technician Job Search
List your certifications front and center
Employers scan resumes fast, so put your ASE certifications, manufacturer-specific training, and any state emissions inspection licenses in a dedicated section near the top. Buried credentials cost you interviews, especially when applicant tracking systems screen for them.
Tailor your resume to the fleet type
A resume built around over-the-road semi trucks reads differently than one focused on construction equipment or municipal transit buses. Match your engine families, component experience, and diagnostic tools to the specific fleet each employer runs before you apply.
Apply early to roles that fit
Migrate Mate lists diesel service technician openings from across the United States in one place, so you can find roles that match and apply directly to each listing.
Highlight diagnostic software you know
Shops increasingly screen for technicians who already know Cummins INSITE, Detroit Diagnostic Link, or Allison DOC. Name the exact software on your resume rather than writing 'diagnostic tools,' since vague phrasing rarely survives an ATS keyword filter.
Ask about shop equipment during interviews
Questions about the lift capacity, scan tool inventory, and parts turnaround time signal that you work efficiently and know what slows a bay down. Interviewers at dealerships and independent shops both respond well to candidates who already think in uptime terms.
Negotiate your tool allowance separately
Diesel technicians carry significant personal tool investments, so clarify whether the employer provides a tool allowance, a tool loan program, or nothing before you accept an offer. The gap between shops on this point can meaningfully affect your total compensation.
Diesel Service Technician Jobs: Frequently Asked Questions
Which companies are hiring the most diesel service technicians?
The most active employers for diesel service technicians right now are MHC Kenworth, The Larson, and Cummins, and the most openings are in Texas, Georgia, and Florida, based on current listings on Migrate Mate as of November 2026. Demand is particularly strong at dealerships, national trucking fleets, and heavy equipment rental companies.
How many diesel service technician jobs are remote?
About 4% of diesel service technician openings are fully remote or hybrid as of November 2026, since most of the work requires physical access to vehicles and equipment. The sub-areas most likely to include remote components are warranty administration, parts advising, and regional technical support roles that combine field visits with documentation work from home.
How do you become a diesel service technician?
Start by completing a diesel technology program at a trade school or community college, which typically covers engine systems, electrical diagnostics, and hydraulics. From there, pursue an entry-level technician or lube tech position to build hands-on hours. As you accumulate experience, sit for ASE certifications in the medium and heavy truck categories, and pursue any manufacturer-specific training offered by the brands your employer services.
Can you get hired as a diesel service technician with little experience?
Yes, many shops hire entry-level candidates into lube technician or technician helper roles specifically to develop them over time. Completing a formal diesel program signals mechanical fundamentals even without shop hours. Emphasizing any agricultural, military, or fleet maintenance background on your resume helps, and smaller independent shops are often more willing to train candidates who show strong mechanical aptitude and a reliable work history.
What does the diesel service technician interview process look like?
Most diesel technician interviews start with a phone or in-person conversation about your experience with specific engine families and diagnostic tools. A shop tour and a practical skills assessment or hands-on demonstration are common at dealerships and larger fleets. Interviewers typically ask how you approach a no-start diagnosis or a recurring electrical fault, so be ready to walk through your diagnostic process step by step.
Where can I find and apply to diesel service technician jobs?
You can find and apply to diesel service technician jobs on Migrate Mate, which lists current openings from employers across the United States. Search the listings for roles that match your experience level, certifications, and preferred fleet type, then apply directly to each one that fits.
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