Diesel Technician III

Job Description

Job Description

Kelly Services is hiring a Diesel Technician III for a direct-hire opportunity with our client’s Truck Service Point team. This is a senior-level diesel technician role ideal for someone with advanced diagnostic experience, strong electrical and aftertreatment knowledge, and the ability to mentor other technicians in a busy shop environment.

DIRECT HIRE
Pay: $36.00 to $43.00 per hour, based on experience
Shift: 10:30am-6:30pm first 6 months, then 3:30-11pm

The Diesel Truck Technician III is responsible for performing complex diagnostics and advanced repairs on diesel-powered trucks and related equipment. This role serves as a technical expert within the shop, supporting high-quality repair standards, troubleshooting difficult issues, and helping train junior technicians.

Key Responsibilities

Advanced Diagnostics & Repair

• Diagnose and repair complex mechanical, electrical, aftertreatment, and driveline systems.
• Troubleshoot diesel engines, DPF, DOC, SCR, emissions systems, multiplexing systems, CAN bus networks, and high-level electrical faults.
• Perform engine performance testing, calibrations, and software updates using OEM diagnostic tools.
• Read and interpret wiring diagrams, schematics, service manuals, and diagnostic reports.

Major Component Repair

• Replace engine components including turbochargers, injectors, EGR systems, pumps, and related parts.
• Perform repairs and replacements on transmissions, differentials, axles, brakes, suspension, and steering systems.
• Complete advanced repairs with a focus on safety, accuracy, and quality.

Preventative Maintenance & Compliance

• Conduct and verify all levels of preventative maintenance, including PM A, B, and C inspections.
• Perform DOT inspections and ensure work meets regulatory compliance standards.
• Identify recurring fleet issues and recommend corrective actions.

Leadership & Technical Support

• Mentor and train Technician I and II team members on diagnostics, repair methods, and shop best practices.
• Serve as a technical resource for complex repair assignments.
• Support shop leadership with quality control and repair verification.

Required Qualifications

• Minimum 5+ years of experience in diesel truck or heavy equipment repair.
• Advanced diagnostic experience using OEM software such as Cummins INSITE, Detroit DiagnosticLink, Navistar , or similar tools.
• Strong understanding of electrical systems, aftertreatment systems, emissions systems, and data networks.
• Ability to read complex wiring diagrams, schematics, and service manuals.
• Valid driver’s license.
• Ability to lift 50+ lbs. and perform physically demanding work in a shop environment.

Preferred Qualifications

• Formal diesel technology education or equivalent hands-on experience.
• ASE Medium/Heavy Truck T-Series certifications or ASE Master certification.
• OEM-specific training or certifications such as Cummins, Detroit, PACCAR, Navistar, or Allison.
• Experience training or mentoring other diesel technicians.
• Strong communication, problem-solving, and leadership skills.
• CDL Class A or B preferred.

Apply Today

Take the next step in your diesel technician career with Kelly Services. Apply today to be considered for this senior-level Diesel Technician III opportunity.

As part of our promise to talent, Kelly supports those who work with us through a variety of benefits, perks, and work-related resources. Kelly offers eligible employees voluntary benefit plans including medical, dental, vision, telemedicine, term life, whole life, accident insurance, critical illness, a legal plan, and short-term disability. As a Kelly employee, you will have access to a retirement savings plan, service bonus and holiday pay plans (earn up to eight paid holidays per benefit year), and a transit spending account. In addition, employees are entitled to earn paid sick leave under the applicable state or local plan. Click here for more information on benefits and perks that may be available to you as a member of the Kelly Talent Community.

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