Sr Mobile Diesel Mechanic

Cox Fleet keeps your fleet moving!

Headquartered in Indianapolis, Cox Fleet has grown to become one of the largest fleet maintenance companies in the country. We are 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. Cox Fleet 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.

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, the Sr. Mobile Diesel Technician is considered the lead on jobsites by customers and technicians, functions as a consultant on the customer’s behalf, and complies with all company policies and achieves high level performance metrics.

• 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 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 electrical/brake/cooling systems, starters/alternators, air conditioning systems, fan clutches, engine electronics, diesel steering systems, engines, transmissions, 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 ensure they are working properly.
• Identify problems, determine accuracy and relevance of information, and use sound judgment to generate and evaluate alternatives.
• Independently manage parts inventory and equipment on the company‑issued service truck, performing periodic reconciliation.
• Maintain and operate the company‑issued service vehicle, conducting 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 problems, or satisfy expectations.
• Manage concurrent assigned tasks, prioritizing work‑related activities and time allocations.
• Use hand tools, precision instruments, diesel tools, welding equipment, lift and jacks.
• Document according to company standards and upload pictures of work performed, parts used, and all findings observed on repair orders (RO) via company‑issued iOS device and the TRAIT application.
• Accurately complete DOT forms and other documentation in a timely fashion.
• Work independently and manage own daily schedule.
• Maintain a high level of productivity and work within or close to most standard repair times.
• Obtain parts from approved local and national vendors as necessary for repairs.
• Communicate with management and support teams via email or phone to obtain approvals on repair estimates, retrieve purchase order numbers, and discuss RO findings.
• Perform all work in compliance with safety, health, environmental policies and federal regulations, including OSHA, EPA, and DOT.
• Maintain the company‑issued service truck and conduct safety checks and daily pre/post‑trip inspections.

• High School Diploma/GED and 5 years’ experience in a related field. Alternatively, any level degree or certification beyond a HS diploma/GED in a related discipline and 3 years’ experience, or 7 years’ experience in a related field.
• Possess and supply a set of hand tools necessary to perform required job duties.
• Obtain Automotive…