On‑Site Mobile Diesel Fleet Technician

El Pollo Loco, Inc.; Commerce City (CO); On-site; USD 39,000 - 52,000; Full time

Benefits offered by this job

8 Paid Holidays & 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

Job summary

The Mobile Fleet Technician at W.W. Williams performs on-site preventive maintenance, inspections, diagnostics, and repairs on diesel engines and heavy-duty trucks at customer sites, ensuring DOT compliance and high repair quality.

You will diagnose electrical, HVAC, emissions systems, complete PM services, maintain safety standards, and train junior technicians while documenting work and managing parts and tools.

Qualifications

• 3+ years of diesel repair experience; 5-7 years preferred in fleet, dealership, or mobile technician environments.
• Certificate from a technical school or equivalent hands-on experience.
• Valid Driver's License; DOT Medical Card (or ability to obtain).
• ASE Certifications: T4 (Brakes), T7 (HVAC), T8 (PM).
• MACS 609 or equivalent mobile A/C certification.
• Strong diagnostic and troubleshooting skills across multiple systems (brake, emissions, electrical, HVAC).
• Proficient in Microsoft Office and diagnostic software.
• Clear written and verbal communication; able to work in physically demanding environments.

Responsibilities

• Perform quality repairs and preventive maintenance on diesel engines and heavy-duty trucks per manufacturer specs.
• Conduct thorough vehicle inspections to identify damaged, worn, or broken parts.
• Create and execute job repair plans based on diagnostics, including estimating labor hours and parts.
• Diagnose and repair electrical systems, A/C, emissions controls, and other diesel components.
• Complete PM services, DOT inspections, and documentation accurately.
• 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.
• Utilize company tools appropriately and maintain a personal tool inventory.
• Support and train junior technicians as needed.
• Adhere to safety, EPA, and company policies.

Skills

Diesel repair

Diagnostics

Customer communication

Physical endurance

Microsoft Office

Education

Technical school certificate

Tools

Diagnostic software

Job description

The Mobile Fleet Technician at W.W. Williams performs on-site preventive maintenance, inspections, diagnostics, and repairs on diesel engines and heavy-duty trucks at customer sites, ensuring DOT compliance and high repair quality.

You will diagnose electrical, HVAC, emissions systems, complete PM services, maintain safety standards, and train junior technicians while documenting work and managing parts and tools.