Mobile Fleet Technician

W.W.Williams Company•Phoenix, AZ
•Onsite

About The Position

The Mobile Fleet Technician performs on-site preventive maintenance, inspections, diagnostics, and repairs on diesel engines and heavy-duty trucks at customer locations. The role requires technical proficiency, a customer-first mindset, and the ability to work independently in varied environments and weather conditions. The technician ensures compliance with DOT standards and internal repair quality expectations. Work is performed primarily on second shift and may require nights or weekends. The role involves frequent exposure to moving mechanical parts, outdoor conditions, high temperatures, cold, humidity, and airborne particles. Regular physical activities include standing, walking, climbing, kneeling, and lifting up to 50 pounds.

Requirements

  • At least 3 years of diesel repair experience.
  • Technical school certificate or equivalent hands-on experience.
  • Valid driver's license.
  • DOT Medical Card, or ability to obtain one.
  • ASE certifications T4 (Brakes), T7 (HVAC), and T8 (PM).
  • MACS 609 or equivalent mobile A/C certification.
  • Strong diagnostic and troubleshooting skills across brake, emissions, electrical, and HVAC systems.
  • Familiarity with repair planning and parts reuse.
  • Proficiency in Microsoft Office and diagnostic software.
  • Clear written and verbal communication skills.
  • Ability to work in physically demanding environments.

Nice To Haves

  • 5–7 years of experience in fleet, dealership, or mobile technician environments.

Responsibilities

  • Perform quality repairs and preventive maintenance on diesel engines and heavy-duty trucks according to manufacturer specifications.
  • Inspect vehicles to identify damaged, worn, or broken parts.
  • Create and execute repair plans based on diagnostics, including estimating labor hours and required parts.
  • Diagnose and repair electrical systems, A/C systems, emissions controls, and other diesel engine components.
  • Complete preventive maintenance services and DOT inspections, and accurately document the work.
  • Use diagnostic software and follow electronic repair procedures.
  • Maintain a clean and safe work area at customer sites and in the company vehicle.
  • Maintain accurate records for invoicing and warranty claims.
  • Use company tools appropriately and maintain a personal tool inventory according to company policy.
  • Support and train junior technicians as needed.
  • Follow safety, EPA, and company policies.

Benefits

  • 8 paid holidays and 1 paid wellness day
  • Paid time off
  • Employee referral bonus program
  • Medical, dental, and vision insurance
  • 401k with a company match
  • Company-paid training
  • Growth and leadership opportunities
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