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Mobile Diesel & Trailer Mechanic II

Job in Auburn, Worcester County, Massachusetts, 01501, USA
Listing for: Cox
Full Time position
Listed on 2026-06-18
Job specializations:
  • Trades / Skilled Labor
    Heavy Equipment Mechanic
Salary/Wage Range or Industry Benchmark: 60000 USD Yearly USD 60000.00 YEAR
Job Description & How to Apply Below
Position: Mobile Diesel & Trailer Mechanic II $3000 New Hire Bonus

Job Summary

To support growth of the company, Cox Fleet is currently hiring a Mobile Trailer Technician II to join our team! This is a dedicated on‑site position. The Mobile Trailer Technician II will be responsible for performing certified DOT inspections, preventative maintenance inspections, light repairs, and other duties such as trailer brakes, air lines, auxiliary pumps and engines, liftgates, brake chambers, welding, fabrication, replacement of panels, body, and framework.

Work is performed at the customer's site. The Mobile Trailer Technician II can perform more advanced repairs under the supervision of a Sr Mobile Trailer Technician or higher, and assists senior technicians while continuing to learn additional advanced mechanical skills. A successful Mobile Trailer Technician II complies with all company policies and achieves high level performance metrics.

Duties
  • Preventive maintenance and repairs on Thermo King, Carrier and other refrigeration equipment; DOT inspections on Freightliner and Mack trucks; trailers out of service truck with little or no supervision.
  • Diagnose, repair and replace compressors, coils, and electrical components.
  • Always follow and comply with safe operating practices and procedures.
  • Independently manage parts inventory and equipment provided on the company‑issued service truck and perform periodic reconciliation.
  • Maintain and operate the company‑issued service vehicle, conduct safety checks, and perform pre‑ and post‑trip inspections.
  • Apply knowledge acquired through formal training or on‑the‑job experience to perform the job; work with, understand, and evaluate technical information related to the job.
  • 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 tasks, making effective judgments to prioritize work‑related activities and time allocations.
  • Act with integrity, demonstrate honesty, keep commitments, behave consistently, keep sensitive information confidential, and adhere to ethical and professional standards.
  • Perform scheduled preventative maintenance (“PM”), DOT inspections and follow‑up repairs on trailers and equipment in a mobile/field environment.
  • Respond to call‑center‑dispatched unscheduled service and maintenance requests.
  • Use hand tools, precision instruments, trailer tools, welding equipment, and jacks.
  • Document according to company standards and upload pictures of work performed, parts used, and all findings observed on Repair Orders (“RO”) using an 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 one's 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 repairs.
  • Communicate with management and support teams via e‑mail 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.
  • Participate and complete all company‑required safety training.
  • Establish and maintain good working relationships with assigned customers and vendors; communicate effectively both verbally and in writing.
  • Perform minor adjustments and repairs on various types of trailer equipment and systems, including trailer brakes, air lines, auxiliary pumps and engines, liftgates, and brake chambers.
  • Adhere to company policies, processes, and procedures.
  • Remain up to date on safety protocols and procedures.
  • Diagnose, adjust, and perform repairs on various types of trailer equipment and systems, including trailer brakes, air lines, auxiliary pumps and engines, liftgates, brake chambers, welding, fabrication, replacement of panels, body, and framework.
  • Identify problems, determine accuracy and relevance of information, and use sound judgment to generate and evaluate alternatives.
  • Inspect, test, and listen to…
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