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Sr Mobile Diesel Mechanic - Day Shift

Job in Mesa, Maricopa County, Arizona, 85201, USA
Listing for: Cox
Full Time position
Listed on 2026-06-30
Job specializations:
  • Trades / Skilled Labor
    Diesel Mechanic, Heavy Equipment Mechanic
Salary/Wage Range or Industry Benchmark: 44441 - 66689 USD Yearly USD 44441.00 66689.00 YEAR
Job Description & How to Apply Below

Sr. Mobile Diesel 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, and considered the Lead on jobsites by customers and Technicians. Functions as a consultant on the customer's behalf.

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 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 (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 3 years' experience in a related field (or equivalent combination such as a level degree/certification beyond a HS diploma/GED and 5 years' 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.
  • This position follows regulations issued by the Department of Transportation's Federal Motor Carrier Safety Administration (FMCSA). Candidate must be able to successfully complete and pass a DOT-regulated pre-employment background screening and DOT physical prior to employment.
  • A current and valid DOT medical card with more than four months remaining until its expiration may be submitted in lieu of a DOT physical; if the DOT medical card has four months or less of validity remaining, a DOT physical will be required.
  • Due to interstate operating authority commerce regulations, candidates must be at least 21 years or older.
  • Safe drivers needed; valid driver's license required. Candidate must hold a valid state-of-residence driver's license, be able to obtain and maintain their Driver Qualification File.
Required Certifications or Obtained Within 18 Months
  • ASE T8 (PMI) certification
  • ASE 608/609 certification*
Preferred Certifications
  • ASE T2 (Diesel Engines) certification
  • ASE T3 (Drivetrain) certification
  • ASE T4 (Brakes) certification
  • ASE T5 (Suspension) certification
  • ASE T6 (Electrical and Electronic Systems)
  • ASE T7 (HVAC) certification
  • ASE A8 (Engine Performance) certification
  • ASE L1 (Advanced Engine Performance Specialist)
  • ASE L2 (Electronic Diesel Engine Diagnosis Specialist)…
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