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Sr Mobile Diesel Mechanic

Job in Wilmington, New Castle County, Delaware, 19894, USA
Listing for: Cox
Full Time position
Listed on 2026-08-22
Job specializations:
  • Trades / Skilled Labor
    Diesel Mechanic, Heavy Equipment Mechanic
Salary/Wage Range or Industry Benchmark: 48216 - 73012 USD Yearly USD 48216.00 73012.00 YEAR
Job Description & How to Apply Below

Sr. Mobile Diesel Technician

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.

Responsibilities
  • 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 that they are working properly.
  • Identify problems, determine accuracy and relevance of information, using sound judgment to generate and evaluate alternatives.
  • Independently manage parts inventory and equipment provided on company‑issued service truck and perform periodic reconciliation.
  • Maintain and operate company‑issued service vehicle, conduct safety checks, and pre‑/post‑trip inspections of vehicle.
  • Work with and listen effectively to clients and customers to assess their needs, providing information or assistance, resolving their problems, or satisfying their expectations.
  • Manage concurrent assigned tasks, making effective judgments as to prioritizing work‑related activities and time allocations.
  • Use hand tools, precision instruments, as well as 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") using company‑issued iOS device and our proprietary TRAIT application.
  • Accurately complete DOT forms and all other forms of documentation in timely fashion.
  • Work with a high degree of independence and manage own daily schedule.
  • Maintain a high level of productivity and be able to work within or close to most Standard Repair Times.
  • Obtain parts from approved local and national vendors as necessary for the repairs to be performed.
  • Communicate with management and support team via email or phone to obtain approvals on repair estimates, retrieve purchase order numbers and/or discuss RO findings notes.
  • Perform all work in compliance with organizational safety, health and environmental policies, and federal regulations, to include OSHA, EPA, and DOT.
  • Maintain company‑issued service truck, conduct safety checks and daily pre/post trip inspections.
Requirements
  • High School Diploma/GED and 5 years' experience in a related field. The right candidate could also have a different combination, such as any level degree/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 Service Excellence (ASE) certification T8 (PMI) within eighteen (18) months.
  • Obtain 608/609 certification within eighteen (18) months.
  • Complete DOT‑regulated pre‑employment background screening and DOT physical prior to employment, as required by FMCSA regulations.
  • Submits a current and valid DOT medical card with more than four (4) months remaining until its expiration, or complete a DOT physical if the card is expiring within four (4) months.
  • Be at least 21 years old.
  • Hold a valid state-of-residence driver’s license, be able to obtain and maintain a Driver Qualification File.
Preferred Certifications
  • ASE T8 (PMI)
  • ASE 608/609
  • ASE T2 (Diesel Engines)
  • ASE T3 (Drivetrain)
  • ASE T4 (Brakes)
  • ASE T5 (Suspension)
  • ASE T6 (Electrical…
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