5yrs Experienced Diesel Mechanic

ROAD ONE MOBILE INC; Ontario (CA); On-site; USD 65,000 - 90,000; Full time

Benefits offered by this job

401(k)

Bonus based on performance

Company car

Competitive salary

Flexible schedule

Opportunity for advancement

Paid time off

Job summary

Road One Mobile Inc in Ontario, CA is seeking an experienced Diesel Mechanic to join our hands-on team keeping a fleet of heavy-duty vehicles on the road. You will diagnose, repair, and maintain diesel-powered trucks and trailers, perform preventive maintenance, and ensure DOT compliance.

Strong diagnostic skills with engines from Cummins, Detroit, and PACCAR are essential; ASE certification is preferred. We offer a competitive salary, benefits, and opportunities for advancement in a fast-paced

Qualifications

• 5+ years of hands-on diesel mechanic experience.
• Skilled in diagnosing and repairing diesel engines from major brands.
• Experience with diagnostic tools such as Nexiq or Jaltest.
• Knowledge of DOT regulations and safety standards.
• ASE certification or trade school training preferred.
• Must supply own set of professional hand tools.
• Strong attention to detail and ability to work independently.

Responsibilities

• Diagnose, repair, and maintain diesel-powered trucks, trailers, and heavy-duty vehicles.
• Perform preventive maintenance including oil changes, brake inspections, and fluid checks.
• Troubleshoot engine, transmission, electrical, and hydraulic system failures.
• Conduct DOT inspections and ensure vehicles meet compliance and safety standards.
• Utilize diagnostic software and tools to identify and resolve mechanical issues.
• Complete accurate repair orders and maintenance documentation.
• Coordinate with fleet managers to prioritize repairs and minimize vehicle downtime.

Skills

Diesel engine diagnostics

Cummins/Detroit/Paccar repair

Electrical system troubleshooting

Preventive maintenance

Detail-oriented

Education

ASE certification or trade school

Tools

Nexiq

Jaltest

Job description

Benefits:

401(k)

Bonus based on performance

Company car

Competitive salary

Flexible schedule

Opportunity for advancement

Paid time off

About the Role:

Road One Mobile Inc is looking for an Experienced Diesel Mechanic to join our team in Ontario, CA! This is a great opportunity to put your skills to work in a fast-paced, hands-on environment where your expertise keeps our fleet running strong. If you're passionate about diesel engines and take pride in quality work, we want to hear from you.

Responsibilities:

Diagnose, repair, and maintain diesel-powered trucks, trailers, and heavy-duty vehicles

Perform preventive maintenance including oil changes, brake inspections, and fluid checks

Troubleshoot engine, transmission, electrical, and hydraulic system failures

Conduct DOT inspections and ensure vehicles meet compliance and safety standards

Utilize diagnostic software and tools to identify and resolve mechanical issues

Complete accurate repair orders and maintenance documentation

Coordinate with fleet managers to prioritize repairs and minimize vehicle downtime

Requirements:

5+ years of hands-on diesel mechanic experience required

Proficiency in diagnosing and repairing diesel engines (Cummins, Detroit, Paccar, etc.)

Experience with electronic diagnostic tools such as Nexiq, Jaltest, or similar

Knowledge of DOT regulations and commercial vehicle safety standards

ASE certification or equivalent trade school training preferred

Must supply own set of professional hand tools

Strong attention to detail, self-motivated, and able to work independently

About Us:

Road One Mobile Inc is a trusted name in commercial vehicle services, proudly serving the Ontario, Los Angeles, San Diego CA area and beyond. Our customers rely on us for dependable, high-quality fleet maintenance and repair that keeps their operations moving. We foster a team-first culture where skilled technicians are valued, supported, and given the tools they need to succeed.