Can you turn a fault code into a fix? At Custom Truck One Source (CTOS) , our 30+ years, 40+ locations, 2,600 employees, and 10,000+ asset fleet power essential industries—utility, telecom, rail, and construction. We're searching for a Heavy Truck Diagnostic & Hydraulics Specialist who thrives on complex problems and keeps equipment online, whether in the shop or on a mobile service call. You Will Diagnose mechanical, hydraulic, and electronic issues with advanced scan tools and software.

Rebuild and repair chassis systems:

steering, suspension, braking, and driveline on Class 6-8 platforms. Service emissions systems with emphasis on EGR circuits, coolers, and valves; support DPF/DEF performance. Install, configure, and repair PTO gearboxes and integrated hydraulic systems (pumps, valves, cylinders, winches). Read schematics to troubleshoot 12V/24V electrical circuits, harnesses, starting/charging systems, and ECMs. Do You Have A valid driver's license (CDL is a plus)? Proven experience as a diesel tech on heavy trucks (Class 6, 7, or 8)? High mechanical aptitude and an unwavering commitment to safety and compliance? Vocational/technical school training or military mechanical experience?

What You'll Work On Systems & Skills:

Diesel engine systems (including light-duty diesel), diesel & heavy equipment systems, hydraulic systems/components, electrical systems & diagnostics (heavy equipment), and advanced troubleshooting.

Equipment:

Diesel engines and vehicles, box trucks, flatbeds/pickups, cranes, boom trucks, digger derricks, aerial devices, boom cranes, refuse trucks, hi-rail trucks, PTO-driven gear, and aftertreatment (DPF/DEF). Why CTOS Competitive, skills-based pay Paid vacation, sick time, and holidays 401(k) match Medical, dental, vision, and prescription benefits Uniforms and boot allowance Ongoing training and development Equal Opportunity Employer