On-Site Heavy-Duty Diesel Diagnostic Specialist

Dtr-Services; San Antonio (TX); On-site; USD 42,000 - 72,000; Full time

Benefits offered by this job

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Job summary

Dtr-Services is seeking a Diesel Mechanic/Technician to diagnose and repair diesel engines at customer sites in and around San Antonio, TX. You’ll perform preventive and corrective maintenance on diesel-powered vehicles, service fuel, transmission, and electrical systems, and keep meticulous records of issues, parts, and work performed.

You’ll communicate repair plans and timelines clearly to customers, stay current with diesel tech trends, and adhere to safety standards while traveling between

Qualifications

• High school diploma or equivalent; diesel tech certification preferred.
• Documented experience as a diesel mechanic/technician.
• Strong command of diesel engine theory, components, and systems.
• Comfort diagnosing and repairing mechanical and electrical faults.
• Sharp problem-solving skills and an eye for detail.
• Valid driver’s license with a clean driving record.
• Excellent communicator with a strong customer service approach.
• Willing to work flexible hours and travel between job sites.

Responsibilities

• Diagnose diesel engine and equipment issues with precision using testing and troubleshooting.
• Execute preventive maintenance and corrective repairs on diesel-powered vehicles.
• Service critical systems, including fuel systems, transmissions, and electrical components.
• Keep thorough service records—issues found, parts used, and work performed.
• Communicate clearly with customers about repair plans, timelines and maintenance best practices.
• Stay informed on emerging diesel technologies and tools.
• Follow all site safety protocols and regulatory standards.

Skills

Diesel engine theory

Troubleshooting

Customer communication

Attention to detail

Record keeping

Education

High school diploma or equivalent

Diesel technician certification (preferred)

Job description

Dtr-Services is seeking a Diesel Mechanic/Technician to diagnose and repair diesel engines at customer sites in and around San Antonio, TX. You’ll perform preventive and corrective maintenance on diesel-powered vehicles, service fuel, transmission, and electrical systems, and keep meticulous records of issues, parts, and work performed.

You’ll communicate repair plans and timelines clearly to customers, stay current with diesel tech trends, and adhere to safety standards while traveling between