Diesel Truck Technician III Job in Roanoke, VA
Be the Go-To Diagnostic Expert: Diesel Truck Technician III at Lawrence Companies
Tired of flat rate, warranty clocks, and chasing hours? At Lawrence Companies, you’re paid for every hour you work on a fleet you’ll get to know, at a company you’ll own a piece of. We are seeking an experienced **Diesel Truck Technician III** (Class A) to join our maintenance and repair team in Roanoke, Virginia.
In this role, you will act as a senior diagnostic expert capable of independently troubleshooting and repairing complex engine, electrical, and aftertreatment problems on Class 8 trucks. You will also play a key role in mentoring junior technicians and building a stronger shop environment.
Core Maintenance & Fleet Focus
Heavy-Duty Class 8 Fleet
Comprehensive maintenance and component repairs on our own fleet of about 225 trucks spanning flatbed, dry van, and moving operations.
Advanced Diagnostics & ECM
Expert-level troubleshooting using OEM scan tools and software (Freightliner, Volvo/Mack, Cummins INSITE, Detroit DiagnosticLink, PACCAR).
Emissions & Aftertreatment
Specialized diagnosis and servicing of DPF, SCR, and EGR systems alongside complex electrical networks.
Key Responsibilities
- Lead diagnostics and repairs on heavy-duty trucks, trailers, and equipment: engines, aftertreatment, emissions, electrical, transmissions, hydraulics, HVAC, brakes, and suspension.
- Utilize OEM diagnostic software and scan tools to find and fix complex issues, rather than just replacing parts.
- Handle major component repairs and the complex jobs others can’t solve.
- Mentor and train junior technicians as part of building a stronger shop.
- Keep accurate repair records and work closely with fleet management to maximize uptime.
- Safely operate company vehicles and equipment while maintaining high workshop safety standards.
Candidate Qualifications & Technical Requirements
- Class A technician experience required; 5+ years of heavy-duty diesel experience (dealership or fleet experience preferred).
- Advanced electrical and ECM diagnostic skills.
- Proven hands-on experience with aftertreatment systems (DPF, SCR, EGR).
- Proficiency with OEM diagnostic software (Freightliner, Volvo/Mack, Cummins INSITE, Detroit DiagnosticLink, PACCAR, or similar).
- ASE certifications required.
- Valid driver's license (CDL preferred or able to obtain one).
- Your own professional tools.
- Physical capability to lift up to 75 lbs; stand, bend, crawl, climb, and work in varying shop and weather conditions.

