Field Diesel Mechanic & Onsite Mobile Technician

Kooner FMS; Union City (CA); Hybrid; USD 50,000 - 58,000; Full time

Benefits offered by this job

Weekly pay

Cell phone allowance

401(k) with company match

Health benefits after 30 days

Paid vacation, sick time & holidays

Life & disability insurance

Employee assistance program

Referral bonus $500

Career growth opportunities

Job summary

Kooner Fleet Management Solutions is seeking a Diesel Mechanic/Technician to service Class 6-8 trucks in field settings. You will perform preventative maintenance, diagnostics, and repairs while maintaining safety and quality.

Join a family-founded, growth-focused team with competitive pay, weekly paydays, and strong benefits. You’ll operate advanced tools and stay mobile in diverse work environments across the U.S.

Qualifications

• 3+ years hands-on diesel tech experience on Class 6-8 trucks.
• Experience with DOT inspections and air brake repair is a plus.
• Ability to operate mobile apps, navigation systems and digital tools to document repairs.

Responsibilities

• Perform onsite preventative maintenance and DOT inspections on Class 6-8 trucks.
• Respond to dispatch requests for scheduled and unscheduled service.
• Diagnose and repair electrical, brake, cooling, and air systems.
• Use diagnostic tools and handheld computers to identify issues.
• Utilize hand tools, power tools, and welding equipment to complete repairs.
• Road test vehicles to ensure repairs meet quality standards.
• Maintain safety and efficiency, meeting repair times.
• Collaborate with team and support colleagues as needed.

Skills

Diesel technology

CNG engine systems

DOT inspections

Customer communication

Diagnostics tools

Welding equipment

Tools

Hand tools

Welding equipment

Mobile apps

Navigation systems

Digital tools

Job description

Join Us as a Diesel Mechanic/Technician!

About Kooner Fleet Management Solutions

Kooner Fleet Management Solutions is one of the fastest-growing national providers of on-site fleet maintenance, preventative service, and mobile repair solutions. With nearly a decade of industry experience, Kooner FMS helps fleets reduce downtime, extend vehicle life, and simplify operations through proactive maintenance programs and advanced technology.

As a family-founded and field-first company, we take pride in delivering trusted partnerships, exceptional service, and innovative fleet management solutions that keep America’s trucks and trailers road-ready.

Schedule: Sunday-Thursday, 7:00AM - 4:30PM

Why You’ll Love Joining Our Team

• Earn What You Deserve: Competitive pay starting at $36-42/hour based on experience.

• Weekly Paydays: Get paid every Friday – no waiting around!

• Stay Connected: Cell phone allowance included.

• Invest in Your Future: 401(k) with company match.

• Health Benefits that Kick in Fast: Medical, Dental, and Vision coverage after just 30 Days!
• Time to Recharge:Enjoypaid vacation time, paid sick time, and paid holidaysto rest, recharge, and take care of what matters most.

• We’ve Got You Covered: Life & Disability Insurance for added peace of mind – because we take care of our team on and off the job.

• We’re Here for You: Access to our Employee Assistance Program for support when you need it most – we've got your back.

• Bring a Friend, Get Rewarded: Refer great talent and earn $500 per successful hire – no limits on how many bonuses you can earn!

• Grow With Us: Big Career Growth Opportunities in a rapidly expanding, forward-thinking organization.

About the Diesel Mechanic/Technician Role

As a Diesel Mechanic/Technician, you’ll be the expert our customers rely on to keep their fleets on the road. This field-based role is perfect for skilled technicians who enjoy independence and variety in their work. You’ll be responsible for performing preventative maintenance, diagnostics, and repairs on Class 6-8 trucks.

Backed by a supportive team that values your skill, drive and dedication, you’ll tackle new challenges every day and take pride in delivering safe, reliable and efficient service that keeps America moving.

Where You’ll Make an Impact

• Perform onsite preventative maintenance, DOT inspections and follow up repairs on Class 6-8 trucks in a field environment.

• Respond to dispatch requests for scheduled and unscheduled service or maintenance.

• Diagnose and repair electrical, brake, cooling, and air systems - everything that keeps a fleet running strong.

• Use advanced diagnostic tools, including handheld computers and precision instruments, to identify and fix issues fast.

• Put your expertise to work using hand tools, power tools, and welding equipment to get the job done right.

• Road test vehicles to ensure every repair meets top-quality standards.

• Stay productive and efficient, meeting or beating industry-standard repair times.

• Jump in wherever needed – we're a team that supports each other.

What Makes You a Great Fit

• At least 3 years of hands-on diesel tech experience working on Class 6-8 trucks.

• Expertise in CNG engine systems is a huge plus!

• DOT inspection and air brake repair expertise that keeps fleets rolling safely.

• Strong communication skills – you know how to connect and communicate with customers and drivers alike.

• Comfortable using mobile apps, navigation systems and digital tools to stay organized and document repairs.

• Ready for the outdoors – rain or shine at customer yards.

• Independent, dependable, and self-motivated – you take pride in getting the job done right.

• A positive attitude and safety-first mindset.

• Must be 23+with a clean driving record and a valid driver’s license.

• Bring your own hand tools and we’ll supply everything else.

Work Environment

• Work in dynamic, high-traffic areas – safety and precision are key.

• Expect exposure to dust, diesel fumes, and noise typical of a shop or yard environment.

• Safely handle chemicals, oils, and grease as part of repair work.

• Be ready to lift, move, and position heavy equipment or components.

• Stay active – you'll bend, kneel, crawl, and crouch to access vehicle components.

• Work outdoors in all weather conditions – rain or shine, our team gets it done.

Kooner Fleet Management Solutions is an Equal Opportunity Employer. We are committed to creating an inclusive environment for all employees and applicants, free from discrimination and harassment. All qualified candidates will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other characteristic protected by law. We celebrate diversity and are dedicated to fostering a workplace where every team member can thrive.

Kooner Fleet Management Solutions participates in E-Verify for employment eligibility verification.

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