Build and Maintain the Fleets that Move Communities

At Custom Truck One Source (CTOS) in El Reno, OK, you’ll keep utility trucks and equipment, diesel trucks, transit buses, and refuse vehicles mission-ready. As a Heavy-Duty Diesel Fleet Technician, you’ll step into a fast-paced shop where your hands-on expertise keeps essential vehicles safe, reliable, and on the road.

A day in the shop

Morning starts with a quick huddle to prioritize work: a refuse packer with a drivability complaint, a bucket truck due for preventive service, and a bus with an electrical fault. You’ll move confidently between advanced diagnostics, routine maintenance, and precision repairs, collaborating with teammates to keep turnaround times tight and safety uncompromised.

What you’ll do

• Diagnose and troubleshoot diesel engines and related systems across trucks, buses, refuse units, and utility equipment.
• Perform scheduled services and corrective repairs to sustain safety, reliability, and peak performance.
• Inspect, test, and verify functionality of brakes, transmissions, and electrical systems.
• Repair or replace faulty components and assemblies as required.
• Document findings, work performed, and parts used with clear, accurate records.
• Partner with the team to elevate shop efficiency and safety standards.
• Keep current with evolving diesel technology and industry best practices.

What you bring

• High school diploma or equivalent; diesel technical training/certification is preferred.
• Hands-on experience as a diesel mechanic—ideally with heavy trucks, buses, or refuse vehicles.
• Strong command of diesel powertrain and subsystem operation.
• Ability to interpret service literature, schematics, and technical diagrams.
• Sharp diagnostic instincts, quality workmanship, and meticulous attention to detail.
• Valid driver’s license with a clean driving record.
• Flexibility to support operational needs, including some weekends and holidays.

Why you’ll love CTOS

• Competitive pay aligned with your experience
• Comprehensive Medical, Dental, and Vision coverage
• 401(k) with company match
• Paid Time Off plus paid holidays
• Clear career growth pathways and skill development
• Access to industry-leading tools and equipment
• Stability with a nationwide industry leader

Join us in El Reno, OK, and power the equipment that keeps America’s infrastructure moving. Apply today.

Our commitment

Equal Opportunity Employer - EOE