On-Site Diesel Fleet Technician — Diagnostics & PM

W.W.Williams; Atlanta (GA); On-site; USD 65,000 - 80,000; Full time

Benefits offered by this job

Paid Holidays

Paid Wellness Day

401k with Company Match

Medical, Dental, Vision Insurance

Company Paid Training

Growth and Leadership Opportunities

Job summary

The Mobile Fleet Technician is based with W.W. Williams and performs on-site preventive maintenance, inspections, diagnostics, and repairs on diesel engines and heavy‑duty trucks at customer locations. DOT compliance and high repair quality are required as you work independently across varied environments.

The role demands strong diagnostic skills for electrical, HVAC, and emissions systems, plus the ability to plan repairs, maintain records, and train junior technicians as needed.

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 and 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.
• Ability to work in physically demanding environments.

Responsibilities

• Perform quality repairs and preventive maintenance on diesel engines and heavy‑duty trucks per manufacturer specifications.
• 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 required parts.
• Diagnose and repair electrical systems, A/C systems, emissions controls, and other diesel engine components.
• Complete PM services, DOT inspections, and documentation accurately and thoroughly.
• Use diagnostic software and follow electronic repair procedures.
• Maintain a clean and safe work area, both on 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 per company policy.
• Support and train junior technicians as needed.
• Adhere to all safety, EPA, and company policies.

Skills

Diesel repair

Diagnostics

Electrical systems

A/C systems

Safety compliance

Customer communication

Education

Technical school certificate

DOT Medical Card

Valid Driver’s License

ASE Certifications: T4/T7/T8

MACS 609

Tools

Microsoft Office

Diagnostic software

Job description

The Mobile Fleet Technician is based with W.W. Williams and performs on-site preventive maintenance, inspections, diagnostics, and repairs on diesel engines and heavy‑duty trucks at customer locations. DOT compliance and high repair quality are required as you work independently across varied environments.

The role demands strong diagnostic skills for electrical, HVAC, and emissions systems, plus the ability to plan repairs, maintain records, and train junior technicians as needed.