Diesel Shop Foreman (Master Diagnostic Lead)

Western Truck Exchange is rebuilding and growing our service department and were hiring a hands-on Diesel Shop Foreman (Master Diagnostic Lead) with the skills and respect to run the floor. As the Shop Foreman youll be the shops technical authorityadvanced diagnostics dispatch/workflow and quality controlso repairs get done right the first time. Youll also have support from Service and Parts leadership to remove bottlenecks (parts approvals tooling scheduling) and keep production moving.

This role is the communication hub between technicians advisors and parts ensuring repairs are completed properly efficiently and safely.

Why This Role Is Worth It

• Real authority and ownership: diagnostics dispatch quality shop workflow.

• Leadership seat in rebuilding the departmentyour impact will be immediate
• Strong perks including:

  • Profit sharing plan.

  • Quarterly incentive opportunities.

  • Paid training.

  • Employee referral bonus.

  • CDL reimbursement support (as applicable for renewals/endorsements).

What Youll Do

Diagnostics & Technical Leadership (hands-on)

• Perform advanced diesel engine diagnostics and electrical troubleshooting

• Triage incoming commercial truck repair work and build the repair plan

• Assign jobs based on technician skill level and job complexity

• Coach support and assist technicians as needed to get repairs completed correctly

• Drive first-time-fix accuracy and reduce comebacks

Shop Operations and Dispatch

• Own workflow and daily communication between technicians service advisors and parts

• Run daily production meetings (1025 minutes)

• Monitor open repair orders promised times and parts availability

• Walk the floor regularly to remove bottlenecks

• Adjust priorities in real time to keep production on track

Quality Control and Documentation

• Final review and sign-off on repair orders

• Confirm documentation accuracy and proper road testing when required

• Enforce a no-comeback mindset

• Ensure technician notes clearly document root cause and repair performed

Parts Warranty and Shop Standards

• Coordinate with Parts on warranty and core returns

• Maintain a safe and organized shop environment

• Ensure diagnostic tools and shop equipment accountability

Team Leadership and Staffing

• Support technician recruiting interviewing and onboarding

• Coach and develop Diesel Technician

• Participate in performance management and staffing decisions (including discipline when needed)

• Build a high-performing commercial truck repair team that does quality work

AI-Enabled Diagnostics

• Utilize modern diagnostic software and AI-assisted diagnostic tools to improve troubleshooting speed and root-cause accuracy

• Apply strong mechanical judgment and safe repair practices

Required Qualifications

• Valid Class A CDL (or willing to obtain if not currently held) to road test tractors as needed.

• 5 years of medium/heavy-duty truck repair experience.

• Strong technical knowledge and diagnostic problem-solving ability.

• Strong communication and organization skills; ability to lead and support technicians.

• Ability to road test vehicles as needed to diagnose and verify repairs.

• Ability to speak Spanish fluently.

Strongly Preferred

• Familiarity with OEM and warranty processes and dealership operations.

• Comfort driving workflow discipline: clear documentation daily planning and real-time floor management.

• Familiarity with CDK.

Who We Are

At Western Truck Exchange we believe our people are the driving force that keeps our customers and the trucking industry moving forward. We foster a culture of respect appreciation and opportunity recognizing every employees contribution to our shared success.

Western Truck Exchange is the leading retailer of used and new medium-duty commercial trucks in Los Angeles. Established in 1922 were one of Californias oldest licensed dealershipsand were proud to be an International dealership with a service team focused on doing the job right safely and professionally. We are fully certified for CAT andCummins repairs and qualified to provideAllison maintenance and rebuild services.

Were always looking for motivated hardworking professionals who are passionate about helping fleets stay on the road. If youre ready to bring your skills to an industry where reliability matters most wed love to hear from you.

We are an equal opportunity employer and prohibit discrimination/harassment in accordance with applicable laws.