Lead - Diesel Class 8 Technician

Vital Tech Solutions; San Antonio (TX); On-site; USD 65,000 - 90,000; Full time

Job summary

Vital Tech Solutions in San Antonio, TX, is seeking a Diagnostic Diesel Technician to support maintenance operations with advanced troubleshooting, diagnostics, and diesel-powered truck and equipment repairs.

The ideal candidate will have strong electrical and emissions systems knowledge, read wiring diagrams, and bring at least 5 years of hands-on diesel experience. Mentoring junior technicians and adherence to safety and environmental guidelines are expected.

Qualifications

• Minimum 5 years of hands-on diesel technician experience.
• Ability to read wiring diagrams, service manuals, and technical documentation.
• Experience diagnosing and repairing aftertreatment systems: DPF, DEF, SCR.
• Strong electrical troubleshooting background and OEM tool proficiency.

Responsibilities

• Utilize OEM diagnostic software and tools to identify root causes and complete repairs.
• Perform preventative maintenance inspections and flag potential equipment issues.
• Diagnose and repair mechanical, electrical, hydraulic, pneumatic, steering, suspension, brake, and drivetrain issues.
• Maintain safety, environmental, and maintenance standards compliance.
• Document diagnostics, repairs, labor, and parts usage.
• Mentor junior technicians as needed.

Skills

Lead Technician Experience

Electrical troubleshooting

Diesel engine knowledge

Emissions systems

Diagnostics software

Wiring diagrams reading

Safety compliance

Tools

OEM diagnostic software

Scan tools

Job description

San Antonio, United States | Posted on 07/23/2026

Diesel Mechanics! - Join a Company Where People Stay, Benefits Matter, and Respect Comes First.

We are looking for an experienced Diagnostic Diesel Technician to support our maintenance operations through advanced troubleshooting, diagnostics, and repair of diesel-powered trucks and equipment. This position requires a technician with strong electrical and emissions systems knowledge who can accurately diagnose complex mechanical failures and complete repairs safely and efficiently.

Key Responsibilities

• Utilize OEM diagnostic software, scan tools, and technical resources to identify root cause failures and complete accurate repairs
• Conduct preventative maintenance inspections and identify potential equipment concerns before failure occurs
• Diagnose and repair mechanical, electrical, hydraulic, pneumatic, steering, suspension, brake, and drivetrain issues
• Maintain compliance with company safety procedures, environmental regulations, and maintenance standards
• Perform advanced diagnostics and troubleshooting on diesel engines, electronic controls, and emissions systems
• Accurately document diagnostics, completed repairs, labor, and parts usage
• Support shop operations by assisting and mentoring junior technicians as needed
• Service and repair aftertreatment systems including DPF, DEF, and SCR components

Requirements

• MUST HAVE LEAD TECHNICIAN EXPERIENCE
  
• Abilityto read and interpret wiring diagrams, service manuals, and technicaldocumentation
  
• Minimum5 years of hands-on experience as a diesel technician
  
• Familiaritywith OEM diagnostic software, electronic troubleshooting systems, and scantools
  
• Mustprovide own basic hand tools
  
• Experiencedignosing and repairing aftertreatment systems including DPF, DEF, andSCR
  
• Strongdiagnostic and electrical troubleshooting background
  
• Experienceworking with diesel engine platforms such as Cummins, Detroit Diesel, CAT,PACCAR, or equivalent
  
• Experienceperforming repairs on engines, drivetrains, brakes, steering, suspension,and related heavy-duty systems