Mobile Diesel Mechanic II 7 am - 5 pm

Cox Enterprises•Allentown, PA
•$29 - $44•Onsite

About The Position

Cox Fleet is hiring a Mobile Diesel Technician II for a dedicated on-site mobile maintenance role. Work is performed at customer sites; this position does not involve emergency roadside repairs. The technician performs certified DOT inspections, preventive maintenance inspections, and light and advanced repairs on trailers and related equipment. The role serves as a lead on jobsites and provides advanced diagnostics, repair triage, and technical guidance to other mobile technicians, while working independently and maintaining strong relationships with customers and vendors. The technician uses a company-issued service truck, manages parts and equipment inventory, and documents inspections and repairs using a company-issued iOS device and the proprietary TRAIT application. Work must comply with company policies and applicable safety, health, environmental, OSHA, EPA, and DOT requirements. The scheduled shift is Monday through Friday, 7:00 a.m. to 5:00 p.m.; the role requires travel 100% of the time and the employee must live in the specified city, state, or region.

Requirements

  • High school diploma or GED and 5 years of experience in a related field; alternatively, a degree or certification beyond high school/GED in a related discipline and 3 years of related experience, or 7 years of related experience.
  • Possess and supply the hand tools needed to perform the job duties.
  • Obtain ASE T8 (PMI) certification within 18 months.
  • Obtain ASE 608/609 certification within 18 months.
  • Obtain a CDL-A license within 18 months.
  • Successfully complete and pass a DOT-regulated pre-employment background screening and DOT physical; a current valid DOT medical card with more than four months remaining may be submitted instead of a physical.
  • Be at least 21 years old due to interstate operating authority regulations.
  • Have a valid driver’s license in the state of residence, pass a 3-year motor vehicle record review, be eligible to drive under DOT requirements, and maintain a Driver Qualification File.
  • Knowledge of trailer parts and systems, including their design, use, repair, and maintenance.
  • Ability to understand new information and apply it to current and future problem-solving and decision-making.
  • Ability to determine the tools and equipment required for work.
  • Ability to communicate information succinctly and in an organized manner, and engage in effective two-way communication.
  • Ability to use logic and reasoning to evaluate alternative solutions and approaches.
  • Ability to lift, bend, climb, stand, and walk for extended periods; perform moderately heavy labor; and sustain physical effort, including repetitive tasks.
  • Ability to judge relative distances between objects.

Nice To Haves

  • ASE T4 (Brakes) certification.
  • ASE T5 (Suspension) certification.
  • ASE T6 (Electrical and Electronic Systems) certification.
  • ASE T7 (HVAC) certification.

Responsibilities

  • Perform scheduled preventive maintenance, DOT inspections, and follow-up repairs on trailers and equipment in a mobile or field environment.
  • Respond to call-center-dispatched unscheduled service and maintenance requests.
  • Diagnose, adjust, and repair trailer equipment and systems, including aluminum and chem-lite components, trailer brakes, air lines, auxiliary pumps and engines, liftgates, brake chambers, and body and framework components.
  • Perform welding, fabrication, and panel replacement as needed.
  • Provide advanced diagnostics and triage for complicated repairs, and assist and advise Mobile Trailer Technicians I and II on technical issues.
  • Act as a lead on jobsites and a consultant for customers.
  • Manage parts inventory and equipment on the company-issued service truck, obtain parts from approved vendors, and support inventory reconciliation.
  • Maintain and operate the company service vehicle, including safety checks and daily pre- and post-trip inspections.
  • Inspect, test, and listen to defective equipment to diagnose malfunctions using instruments such as handheld computers and pressure gauges.
  • Document work performed, parts used, and findings on repair orders; upload photographs and complete DOT forms and other documentation accurately and promptly.
  • Manage assigned tasks and daily schedule independently, prioritize work, and maintain productivity close to Standard Repair Times.
  • Communicate with customers, vendors, management, and support teams verbally and in writing, including obtaining repair estimate approvals and purchase order numbers.
  • Follow company policies, procedures, safety protocols, and applicable OSHA, EPA, and DOT regulations; participate in required safety training.
  • Maintain ethical and professional standards, protect confidential information, and keep commitments.

Benefits

  • Health insurance beginning on the first day of employment.
  • Dental insurance beginning on the first day of employment.
  • Vision insurance beginning on the first day of employment.
  • 401(k) matching after 90 days: 100% match up to a 6% contribution, plus an additional 2% discretionary company contribution.
  • Accrual of up to 200 hours (five weeks) of paid time off based on tenure.
  • Tuition assistance or reimbursement.
  • Adoption and surrogacy assistance.
  • Pet insurance.
  • Company-paid volunteer hours.
  • Paid holidays.
  • Bereavement leave, time off to vote, jury duty leave, military leave, and parental leave.
  • 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.
  • Company service truck, which employees may take home daily.
  • Company-provided laptop and cellphone.
  • Technical training and career advancement opportunities.
  • Employee discounts on vehicle purchases, cellphone plans, ridesharing, home and rental insurance, and wellness and fitness incentives.
© 2026 Teal Labs, Inc
Privacy PolicyTerms of Service