Join CTOS as a Mobile Expert in Utility Fleet Repair

Sun up on the Gulf Coast. Your phone buzzes with a dispatch to a customer yard where a bucket truck is sidelined with a hydraulic leak. You arrive in your fully equipped service truck — crane, welder, and compressor on board — and get to work. A quick diagnosis, a hose swap, and you’re on to DOT and dielectric checks before rolling to the next site. That’s a day in the life of a Field Service Mechanic at Custom Truck One Source (CTOS).

CTOS is a 30+ year industry leader with 40+ locations, 2,600 employees, and a 10,000+ unit fleet providing specialized support to utility, telecom, rail, and construction customers.

What You’ll Do

• Travel to customer sites to diagnose, repair, and maintain aerial, construction, and light- to heavy-duty truck equipment — including bucket trucks, digger derricks, cranes, service trucks, and more.
• Work across diesel, hydraulic, and electrical systems to troubleshoot issues and perform repairs.
• Conduct inspections and testing on CTOS rental and customer equipment, including DOT inspections and dielectric testing.
• Handle parts replacement, preventative maintenance, and complex field repairs with independence and precision.

Where You’ll Work

• Coverage: Louisiana, Mississippi, East Texas, and Western Alabama.
• Overnight travel required; frequent assignments along the Gulf Coast serving oil, gas, and utility projects.

What We Provide

• A fully outfitted service truck (crane, welder, compressor).
• Competitive pay with overtime opportunities.
• Full benefits, 401(k) match, PTO, a tool program, and more.

What You Bring

• 7+ years of combined shop and field experience.
• Hands-on skill with mechanical, hydraulic, and electrical systems.
• Background with utility, construction (yellow iron), or heavy equipment (CAT, Deere, Komatsu) and medium/heavy-duty trucks.
• Self-sufficient, organized, and team-oriented; comfortable working independently in the field.
• Valid driver’s license required; CDL Class B is a plus. Personal tools required.

Proficiencies That Help You Thrive

• Construction Equipment Maintenance
• Heavy Equipment Repair
• Diesel Engine Systems
• Light Vehicle Diesel Engines
• Diesel & Heavy Equipment Systems
• Electrical Systems & Diagnostics (Heavy Equipment)
• Power Take-Off (PTO) & Auxiliary Systems
• Crane & Lifting Equipment Systems
• Aerial & Utility Equipment Systems
• DOT & Equipment Inspection Compliance

Custom Truck One Source is an Equal Opportunity Employer