Diesel Mechanic
Confirmed on the employer's own hiring board on Oct 29, 2026. First seen by Alion on Oct 28, 2026.
Description
Vinny's Truck Center is hiring a Diesel Mechanic to inspect, diagnose, repair and maintain our customers' medium- and heavy-duty trucks, trailers and equipment. You'll keep fleets on the road by doing the work right the first time, documenting it clearly, and flagging issues before they become breakdowns.
Reports to: Shop Foreman Location: Hagerstown, MD Employment type: Full-time, non-exempt
Key responsibilities
- Diagnose and repair diesel engines, fuel systems, turbochargers and aftertreatment (DPF, DEF/SCR, EGR)
- Troubleshoot electrical systems, wiring, sensors and ECMs using OEM and aftermarket diagnostic software
- Perform preventive maintenance: oil and filter service, fluid checks, lubrication and scheduled inspections
- Repair and adjust air brake systems, suspensions, steering, drivetrains, transmissions and differentials
- Service HVAC, cooling and hydraulic systems
- Complete DOT annual inspections and document defects to FMCSA standards
- Record labor, parts and findings accurately in the work order or fleet maintenance system
- Road-test vehicles to verify repairs
- Respond to roadside or on-site service calls as scheduled
- Keep tools, bays and equipment clean, organized and safe; follow all shop safety and environmental procedures
Requirements
Required qualifications
High school diploma or GED
2+ years of hands-on diesel repair experience on medium- or heavy-duty trucks
Working knowledge of diesel engines, air brakes and 12/24V electrical systems
Ability to use diagnostic laptops and software (e.g., Cummins INSITE, Detroit DiagnosticLink, JPRO, Noregon)
Own basic hand tool set appropriate for heavy-duty repair
Valid driver's license with a clean driving record
Able to read service manuals, wiring diagrams and schematics
Preferred qualifications
ASE certifications (Medium/Heavy Truck T-series); ASE Master Truck Technician a plus
DOT/FMCSA qualified inspector status
Class A CDL
Diesel technology certificate or associate degree
Experience with fleet maintenance software
Welding and fabrication skills
Trailer, reefer or liftgate repair experience
Salary Description
$25 - $35 hr.