Heavy-Duty Fleet Diesel Technician (Chassis, Hydraulics & PTO)

Job Description

Job Description

Custom Truck One Source (CTOS) has spent 30+ years building a nationwide footprint—40+ locations, 2,600 employees, and a 10,000+ unit fleet—supporting utility, telecom, rail, and construction customers.

Step into a day where your diagnostic skill and mechanical instincts keep complex trucks and equipment mission-ready. As a Heavy-Duty Fleet Diesel Technician, you’ll take on full lifecycle maintenance, troubleshooting, and repairs for a diverse lineup of commercial trucks and heavy equipment—both in the shop and on the road when needed.

What your day looks like

• Begin with an inspection plan, then use advanced diagnostic software and tools to pinpoint mechanical, hydraulic, and electronic issues.
• Rebuild and repair chassis, steering, suspension, and braking components for Class 6, 7, and 8 trucks.
• Restore peak emissions performance by servicing EGR systems, coolers, and valves.
• Install, troubleshoot, and repair PTO gearboxes and integrated hydraulic systems, including pumps, cylinders, valves, and winches.
• Interpret schematics to resolve 12V/24V electrical faults across wiring harnesses, starting/charging systems, and electronic control modules.

Who thrives here

• Technicians at every level who’ve worked with medium- and heavy-duty trucks, diesel engines, heavy equipment, refuse vehicles, buses, cranes, utility equipment, or similar machinery.
• Pros with a valid driver’s license (CDL a plus) and proven experience on Class 6, 7, or 8 heavy trucks.
• Safety-focused problem solvers with strong mechanical aptitude.
• Vocational/technical grads and military veterans with specialized mechanical training—your expertise is highly valued.

Why CTOS

• Competitive pay based on skills and experience
• Paid vacation, sick time, and holidays
• 401(k) match
• Healthcare, dental, vision, and prescription insurance
• Uniforms and boot allowance
• Ongoing training and development

**Equal Opportunity Employer

Custom Truck One Source is an Equal Opportunity Employer is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, disability, veteran status, or any other protected status under applicable law.