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Sr Mobile Diesel & Trailer Mechanic

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: Cox Automotive Inc.
Full Time position
Listed on 2025-11-11
Job specializations:
  • Trades / Skilled Labor
    Heavy Equipment Mechanic, Diesel Mechanic
Salary/Wage Range or Industry Benchmark: 60000 - 80000 USD Yearly USD 60000.00 80000.00 YEAR
Job Description & How to Apply Below

Fleet Services – A Cox Automotive Company keeps your fleet moving! Headquartered in Indianapolis, Fleet Services by Cox Automotive has grown to become one of the largest fleet maintenance companies in the country.

Fleet Services is the leading provider of on‑site mobile maintenance and repair services nationwide, offering mobile on‑site fleet service for light, medium, and heavy‑duty trucks and trailers. Fleet Services also services customers utilizing its 50+ nationwide service centers; each offering accident repair, painting, refurbishment, and heavy mechanical repair. We are supported by a 24/7 in‑house call center and provide scheduled maintenance services and unscheduled services to fleets anywhere, anytime.

Position:
Sr. Mobile Diesel and Trailer Technician

The Sr. Mobile Diesel Technician will be responsible for performing licensed DOT inspections, preventative maintenance inspections, light and advanced repairs, advanced mechanical/hydraulic/electrical and electronic diagnostics, and other duties as assigned. Heavily relied upon for advanced diagnostics and triage of complicated repairs by Mobile Diesel Technician I/II. Considered the Lead on jobsites by customers and Technicians. Functions as a consultant on the customer’s behalf.

A successful Sr Mobile Diesel Technician complies with all company policies and achieves high level performance metrics.

Duties
  • Perform scheduled preventative maintenance (“PM”), DOT inspections and follow‑up repairs on light, medium and heavy‑duty vehicles in a mobile/field environment.
  • Perform minor adjustment and repairs on various types of truck equipment including, but not limited to: electrical, brake, cooling systems, starters/alternators, fan clutches, engine electronics, diesel steering systems, engines (gas and diesel), transmissions (manual and automatic), clutches, differentials, etc.
  • Diagnose, adjust, and repair various types of truck equipment including, but not limited to: electrical, brake, cooling systems, starters/alternators, air‑conditioning systems, fan clutches, engine electronics, diesel steering systems, engines (gas and diesel), transmissions (manual and automatic), clutches, differentials, etc.
  • Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers and pressure gauges.
  • Road‑test vehicles to diagnose malfunctions and to ensure they are working properly.
  • Identify problems, determine the accuracy and relevance of information, and use sound judgment to generate and evaluate alternatives.
  • Independently manage parts inventory on the company‑issued service truck and perform periodic reconciliation.
  • Maintain and operate the company‑issued service vehicle, conduct safety checks, and pre‑/post‑trip inspections.
  • Work with and listen effectively to clients and customers to assess their needs, provide information or assistance, resolve their problems, or satisfy their expectations.
  • Manage concurrent assigned tasks, prioritizing work activities and time allocations.
  • Use hand tools, precision instruments, diesel tools, welding equipment, lift and jacks.
  • Document work according to company standards and upload pictures, parts used, and findings on Repair Orders (“RO”) using the company‑issued iOS device and the proprietary TRAIT application.
  • Accurately complete DOT forms and all other required documentation in a timely fashion.
  • Work independently and manage own daily schedule.
  • Maintain high productivity and work within or close to most standard repair times.
  • Obtain parts from approved local and national vendors as necessary.
  • Communicate with management and support team via email or phone to obtain approvals on repair estimates, retrieve purchase order numbers, or discuss RO findings.
  • Perform all work in compliance with organizational safety, health, and environmental policies and federal regulations, including OSHA, EPA, and DOT.
  • Maintain the company‑issued service truck, conduct safety checks and daily pre/post trip inspections.
Requirements
  • High School Diploma/GED and 3 years’ experience in a related field. The right candidate could also have a different combination, such as any level…
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