Diesel Mechanic

Why This Role Matters

Western Truck Exchange is hiring an experienced Diesel Mechanic to diagnose, repair, and maintain commercial trucks in our Los Angeles shop. This role is for someone who can work independently, document repairs clearly, and take pride in fixing trucks correctly the first time.

We are building a stronger shop culture with professional standards, better support, clear communication, and real opportunities for technicians who want to grow their skills.
What You Will Work On

• Perform preventive maintenance inspections, oil changes, chassis lubrication, and related truck maintenance.
• Inspect trucks for worn, damaged, unsafe, or failing components and communicate findings clearly.
• Diagnose and repair diesel engines, gasoline engines when applicable, drivetrain and powertrain components, brakes, suspension, HVAC, electrical systems, hydraulic systems, air systems, instruments, gauges, and related truck systems.
• Repair components such as differentials, transmissions, driveshafts, PTOs, wheel ends, turbochargers, fan clutches, injectors, fuel system components, ECMs, ECUs, and sensors.
• Use diagnostic tools, service information, scan data, and shop support to confirm faults before replacing parts.
• Road test vehicles as needed to confirm concerns and verify completed repairs.
• Document the work performed, parts needed, findings, and repair status in a clear and accurate way.
• Maintain safe work habits and keep your work area organized.

What We Are Looking For

• 5+ years of practical experience in mechanical inspections, diagnostics, and repairs.
• High school diploma or equivalent.
• Valid driver's license; must have or be able to obtain a CDL.
• Proficiency with shop tools and hand tools; ability to supply a basic set of hand tools as applicable by role/level.
• Basic computer skills for maintenance systems, repair documentation, and diagnostic tools.
• Reliable attendance, punctuality, and a professional approach to safety and quality.
• Comfortable working in a non-climate-controlled shop environment.
• Willingness to travel as needed to customer yards and training sites.

Strongly Preferred

• Experience with CAT and Cummins diagnostics and repairs.
• Experience with Allison transmission maintenance and rebuild-related services.
• Experience working on International and Mitsubishi Fuso medium-duty platforms.
• Experience using diagnostic software and electronic service information.
• Vocational, technical, or OEM certifications.

What You Get in Return

• Opportunity to earn $100,000+ annually with a competitive wage system.
• Profit sharing plan.
• Quarterly incentive opportunities through our Rapid Improvement Plan.
• Paid training.
• Employee referral bonus.
• CDL reimbursement support.
• Uniform allowance.
• Employee discount and paid time off.
• A certified repair environment for CAT and Cummins repairs and Allison maintenance/rebuild services.

What To Expect During Hiring

• Complete and submit an application.
• Participate in interviews to confirm fit both ways.
• Complete background check and drug screening requirements.
• Selected candidates may receive a brief technical follow-up questionnaire to indicate proficiency across key systems and repairs.

About Western Truck Exchange

Western Truck Exchange is the leading retailer of used and new medium-duty commercial trucks in Los Angeles. Established in 1922, we are one of California's oldest licensed dealerships and an authorized International dealer.

Our Los Angeles dealership includes a commercial truck repair facility that supports fleets, municipalities, contractors, and local businesses that rely on their trucks every day. We are fully certified for CAT and Cummins repairs and qualified to provide Allison maintenance and rebuild services.

We believe our people are the driving force that keeps our customers and the transportation industry moving forward. We foster a culture of respect, appreciation, and opportunity, recognizing every employee's contribution to our shared success.

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