Mobile Diesel Mechanic in Leesburg, Virginia at RoadRunner Wrecker Service LLC

Key responsibilities

• Diagnose and repair diesel engines, fuel, air-brake, electrical, cooling, drivetrain, suspension and aftertreatment (DPF, DEF/SCR, EGR) systems in the field
• Run computer diagnostics with OEM and aftermarket software (e.g., Cummins INSITE, Detroit DiagnosticLink, JPRO)
• Perform preventive maintenance: oil and filter service, lubrication, brake adjustments, belts, hoses and fluid checks
• Complete DOT annual inspections and document findings accurately
• Respond to roadside and on-site breakdown calls, including after-hours on-call rotation
• Communicate with customers and dispatch about repair status, findings and recommendations
• Complete work orders, parts usage and time records accurately and promptly in the shop software
• Maintain the service truck, tools and parts inventory in clean, safe and road-ready condition
• Follow all safety procedures, including lockout/tagout, roadside safety and proper handling of hazardous materials

Required qualifications

3+ years of hands-on diesel repair experience on Class 6–8 trucks or heavy equipment

High school diploma or GED; diesel technology certificate or equivalent training

Valid driver's license with a clean driving record; able to pass a DOT physical and drug screen

Proficient with diagnostic software, multimeters and electrical schematics

Own a full set of mechanic's hand tools

Able to work independently, prioritize calls and make sound repair decisions without on-site supervision

Strong communication skills with customers and dispatch

Preferred qualifications

ASE certifications (Medium/Heavy Truck T-series), especially T2 Diesel Engines and T4 Brakes

Class A CDL

Qualified DOT/FMCSA annual inspector; brake inspector qualification

Experience with reefer units, liftgates, hydraulics or welding/fabrication

Prior mobile or roadside service experience

Familiarity with fleet maintenance software