Sr Mobile Diesel Mechanic

Sr. Mobile Diesel Technician

Cox Fleet is a leading provider of on‑site mobile maintenance and repair services for fleets nationwide. The Sr. Mobile Diesel Technician performs inspections, maintenance, diagnostics, and repairs for light, medium and heavy‑duty vehicles in a mobile field environment.

• 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, and differentials.
• 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, and differentials.
• 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 functioning properly.
• Identify problems, determine accuracy and relevance of information using sound judgment to generate and evaluate alternatives.
• Independently manage parts inventory and company‑issued equipment, performing periodic reconciliation.
• Maintain and operate 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, lifts, and jacks.
• Document according to company standards and upload pictures of work performed, parts used, and all findings on repair orders (RO) using a company‑issued iOS device and the proprietary TRAIT application.
• Accurately complete DOT forms and all other documentation in a timely fashion.
• Work with a high degree of independence and manage own daily schedule.
• Maintain a high level of productivity and work within or close to standard repair times.
• Obtain parts from approved local and national vendors as necessary for repairs.
• Communicate with management and support team via email or phone to obtain approvals on repair estimates, retrieve purchase order numbers, and discuss RO findings.
• Perform all work in compliance with organizational safety, health and environmental policies, and federal regulations, including OSHA, EPA, and DOT.
• Maintain company‑issued service truck, conducting safety checks and daily pre‑/post‑trip inspections.

• High School Diploma or GED and at least 3 years of experience in a related field, or a combination of a higher degree/certification and at least 5 years of experience.
• At least 3 years of experience with refrigerated equipment.
• Possess and supply a set of hand tools necessary to perform required job duties.
• OEM training and certifications are preferred.
• Participate in and complete all company‑required training.
• Must successfully complete a DOT‑regulated pre‑employment background screening and DOT physical, and hold a valid DOT medical card with more than 4 months remaining, or complete a DOT physical if the card has 4 months or less.
• Must be at least 21 years old due to interstate operating authority commerce regulations.
• Valid driver’s license required; must hold a valid state‑of‑residence driver’s license and be able to obtain and maintain a Driver Qualification File.

• A.S.E. T8 (PMI) certification
• A.S.E. 608/609 certification

• A.S.E. T2 (Diesel Engines) certification
• A.S.E. T3 (Drivetrain) certification
• A.S.E. T4 (Brakes) certification
• A.S.E. T5 (Suspension) certification
• A.S.E. T6 (Electrical and Electronic Systems) certification
• A.S.E. T7 (HVAC)…