Sr Mobile Diesel Mechanic 5 am - 5 pm

Cox Automotive•Harrisburg, PA

About The Position

Cox Fleet is hiring a Senior Mobile Diesel Technician to provide on-site maintenance and repair services for light-, medium-, and heavy-duty vehicles. The role performs licensed DOT inspections, preventive maintenance, light and advanced repairs, and advanced mechanical, hydraulic, electrical, and electronic diagnostics. The technician is relied upon to diagnose and triage complicated repairs, serve as the lead at customer jobsites, and consult with customers. The position works with a high degree of independence, manages a daily schedule and concurrent tasks, and is accountable for productive, safe work that meets company policies and performance expectations. Work takes place in a mobile/field environment and includes maintaining and operating a company-issued service truck, managing its parts inventory, communicating with customers and company support teams, and documenting work using a company-issued iOS device and the TRAIT application.

Requirements

  • High school diploma or GED and five years of experience in a related field; alternatively, a related degree or certification beyond high school/GED and three years of related experience, or seven years of related experience.
  • Possess and supply the hand tools necessary to perform the job.
  • Obtain ASE T8 (PMI) certification within 18 months.
  • Obtain ASE 608/609 certification within 18 months.
  • Successfully complete and pass a DOT-regulated pre-employment background screening and DOT physical before employment. A current, valid DOT medical card with more than four months remaining may be submitted in lieu of a DOT physical; a physical is required if four months or less remain.
  • Be at least 21 years old.
  • Hold a valid driver’s license in the state of residence, drive safely, and be able to obtain and maintain a Driver Qualification File.
  • Be able to lift, bend, climb, stand, and walk for extended periods and perform moderately heavy labor.
  • Be able to exert oneself physically over extended periods without tiring, including when performing repetitive tasks.
  • Communicate information succinctly and in an organized manner, and engage in effective two-way communication.
  • Determine the types of tools and equipment needed.
  • Judge relative distances and use logic and reasoning to evaluate alternative solutions, conclusions, or approaches to problems.

Nice To Haves

  • ASE T2 (Diesel Engines) certification.
  • ASE T3 (Drivetrain) certification.
  • ASE T4 (Brakes) certification.
  • ASE T5 (Suspension) certification.
  • ASE T6 (Electrical and Electronic Systems) certification.
  • ASE T7 (HVAC) certification.
  • ASE A8 (Engine Performance) certification.
  • ASE L1 (Advanced Engine Performance Specialist) certification.
  • ASE L2 (Electronic Diesel Engine Diagnosis Specialist) certification.

Responsibilities

  • Perform scheduled preventive maintenance, DOT inspections, and follow-up repairs on light-, medium-, and heavy-duty vehicles in a mobile/field environment.
  • Perform minor adjustments and repairs on truck equipment and systems, including electrical, brake, cooling, starter, alternator, fan clutch, engine electronics, steering, engine, transmission, clutch, and differential systems.
  • Diagnose, adjust, and repair truck equipment, including electrical, brake, cooling, air-conditioning, starter, alternator, fan clutch, engine electronics, steering, engine, transmission, clutch, and differential systems.
  • Inspect, test, and listen to defective equipment to diagnose malfunctions using tools such as handheld computers and pressure gauges.
  • Road-test vehicles to diagnose malfunctions and ensure they are operating properly.
  • Identify problems and evaluate relevant information and alternative solutions using sound judgment.
  • Independently 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 daily pre- and post-trip inspections.
  • Work with customers to assess needs, provide information or assistance, resolve problems, and meet expectations.
  • Manage concurrent assignments 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 photos of work performed, parts used, and findings to repair orders using the company-issued iOS device and TRAIT application.
  • Complete DOT forms and other documentation accurately and on time.
  • Manage the daily schedule independently and maintain productivity within or close to Standard Repair Times.
  • Obtain parts from approved local and national vendors as needed.
  • Communicate with management and support staff by email or phone to obtain repair-estimate approvals, retrieve 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.
  • Company service truck may be taken 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 beginning after 90 days: 100% match up to a 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 groups and diversity groups.
  • Company-paid volunteer hours.
  • Employee discounts on new vehicle purchases, cellphone plans, ridesharing, home/rental insurance, and other offerings.
  • Wellness and fitness incentives.
© 2026 Teal Labs, Inc
Privacy PolicyTerms of Service