Heavy-Duty Diesel Truck Mechanic / Lead Technician

Job Description

Job Description

Kelly® is hiring a  Heavy-Duty Diesel Truck Mechanic / Lead Technician for a direct opportunity with a growing fleet maintenance operation. This is a great fit for an experienced diesel technician who enjoys advanced diagnostics, hands-on repair work, and leading a team in a busy shop environment.

This operation supports both company assets and carrier partners, with a high volume of work currently in process as the team works through backlog. In this role, you’ll help oversee a team of approximately 7–8 technicians while keeping daily shop operations moving smoothly. If you like staying busy, solving technical issues, and helping keep fleet operations moving, this could be the right next step.

Location: Bolingbrook, IL
Pay: $35.00–$45.00 per hour, based on experience, certifications, and shift assignment
Schedule: Tuesday–Friday, 10:00 AM–6:30 PM, and Saturday, 7:00 AM–3:30 PM

What you’ll be doing:
• Leading, mentoring, and supporting approximately 7–8 technicians in a fast-paced shop environment
• Assigning, prioritizing, and monitoring daily work orders
• Performing advanced diagnostics and repairs on heavy-duty diesel engines, emissions systems, aftertreatment systems, transmissions, drivetrains, suspensions, brakes, electrical systems, and HVAC
• Using diagnostic software such as Cummins Insite, Detroit DiagnosticLink, Bendix ACom, WABCO, Tech Tool, DAVIE4, and other OEM platforms
• Conducting DOT inspections and ensuring equipment meets compliance standards
• Assisting technicians with complex repairs and escalated technical issues
• Supporting preventive maintenance scheduling to maximize fleet uptime
• Communicating repair status, equipment needs, and downtime impacts with leadership and external customers
• Monitoring parts, fluids, and shop supply inventory
• Reviewing and closing work orders for accuracy in labor, parts, and documentation
• Ensuring safe shop practices, PPE use, lockout/tagout procedures, and OSHA/DOT compliance
• Supporting reports related to shop KPIs, equipment conditions, productivity, and operational improvements

This job might be an outstanding fit if you:
• Have 5+ years of experience as a heavy-duty diesel mechanic working on Class 7–8 trucks
• Have 3+ years of management, supervisory, senior technician, or lead technician experience
• Have experience leading or supporting a team of technicians in a shop environment
• Have strong knowledge of diesel engines, air systems, electrical diagnostics, and aftertreatment systems
• Are comfortable troubleshooting with OEM diagnostic software
• Have experience assigning work, training technicians, and supporting shop workflow
• Have a valid driver’s license
• Can lift 50+ lbs. and perform physically demanding tasks in a shop environment
• Are safety-focused, organized, and able to manage multiple priorities

Preferred qualifications:
• CDL Class A or B
• ASE Medium/Heavy Truck Certifications, such as T2, T4, T5, T6, T7, or L2
• Experience with fleet maintenance software such as Fleetrock, TMT, or similar systems

Key strengths for success:
• Leadership and teamwork
• Strong diagnostic and problem-solving ability
• Clear communication and accurate documentation
• Safety-first mindset
• Time management and workflow prioritization
• Ability to support both hands-on repair work and shop operations

Apply today and take the next step in your diesel technician career with Kelly®.

We empower businesses and people to access limitless opportunities.

Company Description

We empower businesses and people to access limitless opportunities.