Field Diesel Technician — Utility & Heavy Fleet Systems

Step Into A Day You’ll Own

Sun up, tools checked, laptop connected. You roll into a bay or head out to a job site ready to keep mission-critical trucks and specialty equipment moving. That’s the rhythm at Custom Truck One Source (CTOS)—a 30+ year industry leader with 40+ locations, 2,600 employees, and a 10,000+ unit fleet serving utility, telecom, rail, and construction markets.

You’ll tackle full-lifecycle maintenance and repairs across commercial trucks and heavy equipment—bumper to bumper. Every day brings a new challenge:

• Pinpoint problems fast:
  Use advanced diagnostic software and test equipment to uncover mechanical, hydraulic, and electronic issues with precision.
• Rebuild the foundation:
  Inspect, repair, and overhaul chassis components—steering, suspension, and braking systems—to keep heavy trucks tracking true.
• Protect performance:
  Service emissions systems with a focus on EGR components, including coolers and valves, to maintain compliance and reliability.
• Power work tools:
  Install, troubleshoot, and repair PTO gearboxes and integrated hydraulics—pumps, cylinders, valves, and winches.
• Master the circuitry:
  Read schematics and repair complex 12V/24V circuits, wiring harnesses, starting/charging systems, and electronic control modules.

• Valid Driver’s License (CDL is a plus)
• Hands-on experience as a Diesel Mechanic on Class 6, 7, or 8 heavy trucks
• Strong mechanical aptitude and an uncompromising commitment to safety and compliance
• Vocational/technical graduates and military veterans with specialty training are encouraged to apply

We invest in you with competitive pay based on skills and experience, paid vacation, sick time, and holidays, a 401(k) match, healthcare, dental, vision, and prescription coverage, company-provided uniforms, a boot allowance, ongoing training, and more.