Field Diesel Service Technician

Step into a day in the field

You start your morning from our St. Louis, MO hub (63129), gear up the service truck, and head to your first call. A generator won’t hold RPM—within minutes you’ve run diagnostics, sourced the right parts, and restored performance. By midday, you’re across town completing preventative maintenance on a fleet truck. You wrap up with clear notes, a quick rundown for the customer, and a safe drive back—ready for tomorrow’s challenges.

What you’ll tackle

• Diagnose, repair, and maintain diesel engines and related equipment in the field.
• Travel to customer locations to handle scheduled and urgent service calls.
• Perform routine inspections and preventative maintenance to maximize uptime.
• Document work performed and parts used with accuracy and clarity.
• Discuss service needs, findings, and recommendations directly with clients.
• Keep current with evolving diesel technologies and industry best practices.
• Uphold safety standards and follow company policies on every job.

What you bring

• High school diploma or equivalent; formal diesel technical training preferred.
• Hands-on experience as a diesel mechanic or similar role.
• Solid understanding of diesel engines, systems, and components.
• Proven ability to troubleshoot and resolve mechanical issues efficiently.
• Valid driver’s license with a clean driving record.
• Strong communication and customer service skills.
• Willingness to travel to multiple job sites as needed.

Where you’ll work

Based in St. Louis, MO (63129), you’ll operate on the go—servicing customer equipment at their locations across the area.