Mobile Diesel Technician

Fleet Watch; Katy (TX); Hybrid; USD 34,000 - 55,000; Full time

Benefits offered by this job

Competitive hourly pay

Health benefits allowance + 401k

Paid time off

Company-provided service truck

Ongoing training opportunities

Career advancement opportunities

Job summary

Fleet Watch, a family-owned mobile fleet maintenance company in the Houston area, is seeking an experienced Mobile Diesel Technician. You will diagnose, repair, and maintain Class 5–8 trucks and fleet equipment at customer sites, traveling regionally in Texas.

You should be highly skilled, self-motivated, and capable of independent work in a mobile service environment while delivering exceptional service to minimize downtime. Regional travel may be required.

Qualifications

• Minimum 5 years of experience as a diesel technician for Class 5–8 vehicles.
• Ability to read wiring diagrams, schematics, and technical manuals.
• Strong diagnostic troubleshooting skills and customer service orientation.

Responsibilities

• Perform preventative maintenance, inspections, diagnostics, and repairs on Class 5–8 trucks, trailers, and fleet equipment.
• Read and interpret wiring diagrams, service manuals, schematics, and technical documentation to identify issues.
• Utilize OEM and aftermarket diagnostic software and tools to troubleshoot malfunctions.
• Complete repairs including brakes, batteries, starters, transmissions, cooling systems, and more.
• Conduct DOT and safety inspections and document findings and recommendations.
• Maintain inventory, safety, and on-call support as needed.

Skills

Heavy-Duty Diesel Experience

Diagnostics Troubleshooting

Electrical & Mechanical Skills

Independent Work Ethic

Reading Wiring Diagrams

Customer Service Focus

Education

High School Diploma or GED

ASE Certifications

EPA 609 HVAC Certification

CDL Class A or B

Brake Inspector Certification

OEM Certifications (Cummins, Detroit Diesel, PACCAR, etc)

Tools

OEM Diagnostic Tools

JPRO/INSITE & Similar Platforms

Aftermarket Diagnostic Tools

Job description

Fleet Watch is a family-owned, mobile fleet maintenance and repair company serving commercial fleets throughout the Houston and surrounding areas. Our mission is simple: Minimize Downtime. Maximize Uptime.

We bring the shop directly to our customers, providing preventative maintenance, diagnostics, repairs, and emergency roadside assistance wherever our clients operate. As a growing company, we offer technicians the opportunity to make a direct impact, build their careers, and grow alongside our organization.

Position Summary

Fleet Watch is seeking an experienced Mobile Diesel Technician to join our growing team. This position is responsible for performing diagnostics, preventative maintenance, inspections, and repairs on medium- and heavy-duty trucks, trailers, and fleet equipment at customer locations throughout the Houston and surrounding areas.

The ideal candidate is highly skilled, self-motivated, customer-focused, and comfortable working independently in a mobile service environment. This role requires strong diagnostic abilities, excellent communication skills, and a commitment to delivering exceptional service while minimizing customer downtime.

Someone who takes ownership, values quality workmanship, and wants to be part of building something from the ground up will be successful here. At Fleet Watch, every team member plays a direct role in our success, and we’re seeking a technician who is excited to grow their career while helping us grow the business.

Location

Preference will be given to candidates located in Katy, TX. Occasional regional travel to service customers across major Texas cities may be required.

Key Responsibilities

• Perform preventative maintenance, inspections, diagnostics, and repairs on Class 5–8 trucks,
  trailers, and fleet equipment.
• Diagnose and repair mechanical, electrical, hydraulic, pneumatic, HVAC, driveline, brake, suspension, charging, starting, and emissions-related systems.
• Read and interpret wiring diagrams, service manuals, schematics, and technical
  documentation to identify and resolve equipment issues.
• Utilize OEM and aftermarket diagnostic software and tools to troubleshoot vehicle and equipment malfunctions.
• Complete repairs, including but not limited to brakes, batteries, alternators, starters, injectors, clutches, transmissions, differentials, cooling systems, fifth wheels, and related components.
• Conduct DOT and safety inspections and identify deficiencies requiring corrective action.
• Accurately document inspections, diagnostics, repairs performed, parts used, labor hours, and recommendations through Fleet Watch’s service management platform.
• Maintain service truck inventory and ensure adequate stock levels of parts, tools, and supplies.
• Safely operate and maintain company vehicles, tools, and equipment.
• Respond to customer inquiries regarding repairs, maintenance recommendations, and equipment condition.
• Identify opportunities for preventative maintenance and additional services that improve fleet reliability and reduce downtime.
• Maintain a professional appearance and represent Fleet Watch positively at customer locations.
• Participate in ongoing technical training and stay current on OEM updates, repair procedures, and industry best practices.
• Support after-hours emergency roadside service and rotating on-call schedules as needed.
• Perform all duties in accordance with company safety policies and industry standards.
• Other duties as required.

Required Qualifications

• High School Diploma or GED
• Minimum 5 years of experience as a diesel technician for Class 5–8 commercial vehicles and equipment
• Strong mechanical, electrical, and diagnostic troubleshooting skills
• Ability to work independently with minimal supervision in a field service environment
• Ability to read and interpret wiring diagrams, schematics, and technical manuals
• Experience using OEM and aftermarket diagnostic software and scan tools
• Must own and maintain a complete set of hand tools necessary to perform heavy-duty diesel maintenance and repair duties.
• Strong critical-thinking, problem-solving, and decision-making skills
• Excellent communication and customer service skills
• Valid driver’s license with an acceptable driving record
• Ability to pass a pre-employment drug screening and physical examinationAbility to perform physically demanding work in varying weather conditions

Preferred Qualifications

• CDL Class A or B
• ASE Certifications
• EPA 609 HVAC Certification
• Brake Inspector Certification
• OEM certifications from manufacturers, including Cummins, Detroit Diesel, PACCAR, International/Navistar, Freightliner, Peterbilt, Hino, Isuzu, and Ford
• Experience with diagnostic platforms including Cummins INSITE, Detroit DDDL, CAT ET, JPRO, Volvo Tech Tool, Allison DOC, Bendix ACom, WABCO Toolbox, Navistar NED, DAVIE4, and SD.
• Ability to travel
• Competitive hourly pay based on experience, certifications, and skill level, with overtime opportunities
• Tax-free monthly health benefits allowance + 401k
• Paid time off
• Company-provided service truck, technology, and diagnostic equipment
• Ongoing training and certification opportunities
• Career advancement opportunities within a growing company

Fleet Watch is an Equal Opportunity Employer committed to providing a safe, professional, and inclusive workplace. We value technicians who take pride in their work, act with integrity, and are dedicated to helping our customers keep their fleets operating safely and efficiently.