Diesel Mechanic (Shop & Field)

Custom Truck One Source (CTOS) is a 30+ year industry leader with 40+ locations, 2,600 employees, and a 10,000+ unit fleet serving utility, telecom, rail, and construction markets.

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**Job Description

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We are seeking a skilled and reliable Heavy Truck Diesel Mechanic to join our service team. In this role, you will perform full-lifecycle maintenance, troubleshooting, and repairs on a diverse fleet of commercial trucks and heavy equipment.

The ideal candidate possesses a strong mechanical aptitude and deep technical knowledge of complex vehicle systems, from bumper to bumper.

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**Key Responsibilities

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• **Diagnostics & Troubleshooting:

  ** Utilize advanced diagnostic software and tools to accurately identify mechanical, hydraulic, and electronic faults.

• **Chassis & Powertrain Repair:

  ** Inspect, repair, and rebuild truck chassis components, steering, suspension, and braking systems.

• **Emissions Systems:

  ** Service and repair critical emissions components, with a strong focus on EGR (Exhaust Gas Recirculation) systems, coolers, and valves.

• **PTO & Hydraulics:

  ** Troubleshoot, install, and repair Power Take-Off (PTO) gearboxes and integrated hydraulic systems (pumps, cylinders, valves, and winches).

• **Electrical Systems:

  ** Read schematics to diagnose and repair complex 12V/24V electrical circuits, wiring harnesses, starting/charging systems, and electronic control modules.

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**Qualifications & Skills

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• Valid Driver’s Licenses (CDL a plus)

• Proven experience as a Diesel Mechanic working on Class 6,7 or 8 heavy trucks.

• High mechanical aptitude and a strong commitment to shop safety and compliance.

• Vocational/Technical school graduates and military veterans with specialized mechanical training are highly encouraged to apply.

CTOS offers competitive pay based on skills and experience, paid vacation, sick, and holidays, 401k match, healthcare, dental, vison, prescription insurance, uniforms, boot allowance, ongoing training and more.

**Equal Opportunity Employer

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You should be proficient in:

• Diesel Engine Systems
• Light Vehicle Diesel Engines
• Ground Support Equipment (GSE) Maintenance
• Diesel & Heavy Equipment Systems
• Hydraulic Systems & Components
• Electrical Systems & Diagnostics (Heavy Equipment)
• Equipment Diagnostics & Troubleshooting

Machines & technologies you'll use:

• Diesel Engine
• Diesel Vehicles
• Box Trucks
• Crane
• Boom Truck
• Digger Derrick
• Aerial Devices
• Boom Crane
• Refuse Truck
• Hi-Rail Truck
• Power Take-Off (PTO)
• After Treatment Systems (DPF, DEF)
• Flatbed Truck / Pickup Truck