About The Position

Cox Fleet is hiring a Mobile Diesel & Trailer Technician to perform maintenance, inspections, diagnostics, and repairs on light-, medium-, and heavy-duty trucks and trailers in a mobile field environment. The technician performs DOT inspections, preventive maintenance, follow-up repairs, and light mechanical, hydraulic, electrical, and electronic diagnostics. More advanced diagnostics and repairs may be performed under the supervision of a Senior Mobile Diesel Technician or higher, while the technician continues to develop advanced mechanical and diagnostic skills. The role requires compliance with company policies and safety, health, environmental, and applicable federal regulations, as well as meeting performance standards. The technician works Wednesday through Sunday, 1:00 p.m. to 11:30 p.m. The position includes use and maintenance of a company-issued service truck, independent management of a daily schedule and parts inventory, customer communication, and timely documentation of work and inspection findings.

Requirements

  • High school diploma or GED and three years of experience in a related field; alternatively, a higher degree or certification in a related discipline, or five years of experience in a related field.
  • Possess and supply the hand tools necessary to perform the job duties.
  • Obtain ASE T8 (PMI) certification within 18 months.
  • Successfully complete and pass a DOT-regulated pre-employment background screening and DOT physical before employment; a current DOT medical card with more than four months remaining may be submitted in place of a DOT physical.
  • Be at least 21 years old due to interstate operating authority regulations.
  • Hold a valid driver’s license from the state of residence, pass a three-year motor vehicle record review, and be able to obtain and maintain a Driver Qualification File.

Nice To Haves

  • ASE T3 (Drivetrain) certification.
  • ASE T4 (Brakes) certification.
  • ASE T5 (Suspension) certification.
  • ASE T6 (Electrical and Electronic Systems) certification.
  • ASE T7 (HVAC) certification.
  • ASE 608/609 certification.

Responsibilities

  • Perform scheduled preventive maintenance, DOT inspections, and follow-up repairs on light-, medium-, and heavy-duty vehicles in a mobile or field environment.
  • Perform minor adjustments and repairs on truck equipment and systems, including electrical, brake, cooling, starting, charging, engine, steering, transmission, clutch, and differential systems.
  • Perform minor adjustments and repairs on trailer equipment and systems, including trailer brakes, air lines, auxiliary pumps and engines, liftgates, and brake chambers.
  • Diagnose, adjust, and repair truck equipment and systems, including air conditioning, electrical, brake, cooling, engine, steering, transmission, clutch, and differential systems.
  • Diagnose, adjust, and repair trailer equipment and systems, including trailer brakes, air lines, auxiliary pumps and engines, liftgates, brake chambers, welding, fabrication, and replacement of panels, body, and framework.
  • Inspect, test, and listen to defective equipment to diagnose malfunctions using instruments such as handheld computers and pressure gauges.
  • Road-test vehicles to diagnose malfunctions and confirm they are operating properly.
  • Identify problems, assess the accuracy and relevance of information, and use sound judgment to evaluate alternatives.
  • Manage parts inventory and equipment on the company-issued service truck and perform periodic reconciliation.
  • Maintain and operate the company-issued service vehicle, conduct safety checks, and complete pre- and post-trip inspections.
  • Work with customers to assess needs, provide information or assistance, resolve problems, and meet expectations.
  • Manage concurrent tasks and prioritize work activities and time effectively.
  • Use hand tools, precision instruments, diesel tools, welding equipment, lifts, and jacks.
  • Document work to company standards and upload photographs of work, parts, and findings to repair orders using a company-issued iOS device and the TRAIT application.
  • Complete DOT forms and other documentation accurately and promptly.
  • Work independently and manage the daily schedule.
  • Maintain productivity and work within or close to standard repair times.
  • Obtain parts from approved local and national vendors as needed.
  • Communicate with management and support teams by email or phone to obtain repair-estimate approvals, purchase order numbers, and discuss repair-order findings.
  • Perform work in compliance with company safety, health, and environmental policies and applicable OSHA, EPA, and DOT regulations.

Benefits

  • Safe-driving and technician-efficiency bonuses.
  • Safety boots and safety glasses reimbursement.
  • Extreme-weather gear for cold and hot conditions.
  • Uniforms provided, with laundry service where available.
  • Take the company service truck home daily.
  • Company-provided laptop and cellphone.
  • Technical training and a dedicated career path.
  • Health, dental, and vision insurance beginning on the first day of employment.
  • 401(k) matching after 90 days: 100% match up to 6% contribution, plus an additional 2% discretionary company contribution.
  • Accrue up to 200 hours (five weeks) of paid time off based on tenure.
  • Tuition assistance or reimbursement.
  • Adoption and surrogacy assistance.
  • Pet insurance.
  • Employee resource and diversity groups, and company-paid volunteer hours.
  • Employee discounts on vehicle purchases, cellphone plans, ridesharing, home and rental insurance, and other programs.
© 2026 Teal Labs, Inc
Privacy PolicyTerms of Service