Senior Diesel Tech: Fleet Diagnostics & Heavy Equipment

CTOS - Trucks & Equipment; Fort Worth (TX); On-site; USD 60,000 - 90,000; Full time

Benefits offered by this job

Paid vacation

Sick time

Holidays

401(k) match

Healthcare

Dental

Vision

Prescription coverage

Uniforms provided

Boot allowance

Ongoing training

Job summary

Custom Truck One Source is seeking an experienced diesel mechanic for Class 6–8 trucks. You will diagnose faults with OEM software, perform repairs across chassis, PTOs, hydraulics, emissions, and electrical systems, and document findings for customers.

Qualifications include a valid driver’s license and CDL preferred, with emphasis on safety and quality. This is an on-site shop role offering competitive pay and benefits, in a team-focused environment.

Qualifications

• Proven diesel mechanic experience on heavy trucks (Class 6–8).
• Strong diagnostic and repair skills across mechanical, hydraulic, electrical systems.

Responsibilities

• Perform full-lifecycle assessment of assigned utility trucks and equipment.
• Diagnose faults using OEM software and test equipment.
• Repair chassis, PTOs, hydraulics, emissions systems, and electrical circuits.
• Document findings and order parts, then finalize quality checks for customers.

Skills

Diesel mechanics

Troubleshooting

Shop safety

CDL preferred

Education

Vocational/technical school

Tools

OEM diagnostic software

Electrical test equipment

Wiring diagrams/schematics

Job description

Custom Truck One Source is seeking an experienced diesel mechanic for Class 6–8 trucks. You will diagnose faults with OEM software, perform repairs across chassis, PTOs, hydraulics, emissions, and electrical systems, and document findings for customers.

Qualifications include a valid driver’s license and CDL preferred, with emphasis on safety and quality. This is an on-site shop role offering competitive pay and benefits, in a team-focused environment.