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Diesel Technician III

Unlimited Carrier Inc

Bolingbrook, IL

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JOB DETAILS
SALARY
$36–$43 Per Hour
SKILLS
ASE, Best Practices, Class A License, Communication Skills, Computer Networks, Corrective Action, Diesel Engine, Document Management, Driver's License, Electrical Engineering, Electricity, Equipment Maintenance/Repair, Hazard Analysis, Heavy Equipment/Vehicles, Identify Issues, Juniper Networks T-Series, Leadership, Lift/Move 50 Pounds, Maintain Compliance, Maintenance Services, Mentoring, Multiplexing, OEM (Original Equipment Manufacturer), Performance Testing, Physical Demands, Preventative Maintenance, Pumps, Quality Assurance, Quality Control, Quality Metrics, Root Cause Analysis, Safety Standards, Safety/Work Safety, Software Administration, Technical Support, Testing, Vehicle Fleets
LOCATION
Bolingbrook, IL
POSTED
1 day ago
Diesel Technician III Department: Truck Service Point Reports To: Shop Foreman Effective Date: 05.28.2026 Position Overview The Diesel Truck Technician III is a highly skilled, senior-level technician 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, providing leadership, mentoring junior technicians, and ensuring high-quality repair standards. Advanced Diagnostics & Repair Perform expert-level diagnostics on complex mechanical, electrical, aftertreatment, and driveline systems. Troubleshoot and repair: Diesel engines Aftertreatment and emissions systems (DPF, DOC, SCR) Multiplexing and CAN bus systems High-level electrical faults and communication issues Transmission and driveline components Conduct engine performance testing, calibrations, and software updates using OEM diagnostic tools. Major Component Repair Perform engine component replacement, including turbochargers, injectors, EGR systems, and pumps. Replace major assemblies such as transmissions, differentials, and axles. Execute advanced brake, suspension, and steering repairs. Preventative Maintenance & Compliance Conduct and verify all levels of preventative maintenance (PM A/B/C), including advanced inspection points. Perform DOT inspections and ensure full regulatory compliance. Identify root causes of recurring fleet issues and recommend corrective actions. Leadership, Training & Technical Support Mentor and train Technicians I and II on best practices, troubleshooting, and repair procedures. Serve as a technical resource for complex job assignments. Support shop leadership in quality control initiatives. Documentation & Reporting Document repairs, diagnostics, and parts usage accurately in maintenance systems. Contribute to procedural improvements and standard operating practices. Safety & Shop Standards Lead by example in following all safety protocols and PPE requirements. Identify hazards and take corrective action to maintain a safe work environment. Ensure proper use and care of shop tools, equipment, and diagnostic devices. Skills and Requirements Required Qualifications Minimum of 5 years of experience in diesel truck or heavy equipment repair. Advanced diagnostic skills using OEM software such as Cummins INSITE, Detroit DiagnosticLink, and Navistar Service Software. Strong understanding of electrical systems, aftertreatment systems, and vehicle data networks. Ability to read and interpret complex wiring diagrams, schematics, and service manuals. Valid driver’s license. Ability to lift 50 lbs. and perform physically demanding work. Preferred Qualifications Formal diesel technology education or equivalent hands-on experience. Multiple ASE Medium/Heavy Truck (T-Series) certifications or ASE Master Certification. OEM-specific training or certifications (Cummins, Detroit, PACCAR, Navistar, Allison). Experience training or mentoring other technicians. Strong communication and leadership skills. CDL Class A or B license. Work Environment Shop environment with exposure to noise, fumes, and heavy machinery. Requires standing, bending, lifting, and use of heavy tools. May require occasional outdoor work depending on facility setup. Compensation Pay Range: $36.00 – $43.00 per hour, based on experience, certifications, and shift. The information above is intended to describe the general nature and level of work performed by associates in this classification. It is not intended to be a comprehensive list of all duties, responsibilities, or qualifications. Schedule Monday–Friday, 10:00 AM – 6:30 PM After 6 months, schedule will change to 3:30 PM – 11:00 PM Monday–Friday, 10:00 AM – 6:30 PM After 6 months, schedule will change to 3:30 PM – 11:00 PM Compensation details: 36-43 Hourly Wage PIae566adb1457-25448-406516475c143e31-5e48-4549-b638-05792d185386

About the Company

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Unlimited Carrier Inc