Heavy-Duty Diesel Technician: Diagnostics & Repairs

Saia; Saint Peters (MO); On-site; USD 4,822,000 - 5,373,000; Full time

Job summary

Saia Inc. is seeking a skilled diesel mechanic to perform maintenance, diagnostics, and repairs on heavy-duty tractors in a fast-paced environment.

You will diagnose mechanical, electrical, and hydraulic issues, use jacks for access, and assist with engine and transmission work. The role requires 2+ years of diesel experience, proficiency with diagnostic software, and a strong commitment to accurate documentation and safety standards.

Qualifications

• Must have 2+ years of diesel mechanic experience.
• Proficiency in diagnostic software.
• High school diploma or GED is required.
• Authorized to work in the United States and able to provide personal maintenance tools.

Responsibilities

• Perform maintenance, repair, and diagnostic tasks on class 6, 7, and 8 tractors.
• Diagnose failures and repair mechanical, electrical, and systems.
• Use hydraulic jacks to access under vehicles and assist in engine/transmission replacements.
• Troubleshoot heavy-duty truck engines, braking, electrical, and exhaust systems.
• Document repairs, inspections, and maintenance tasks; communicate with partners on complex tasks.
• Test vehicles after repairs to ensure proper operation.

Skills

Diesel mechanic experience

Diagnostic software proficiency

Education

High school diploma or GED

Tools

Diagnostic software

Job description

Saia Inc. is seeking a skilled diesel mechanic to perform maintenance, diagnostics, and repairs on heavy-duty tractors in a fast-paced environment.

You will diagnose mechanical, electrical, and hydraulic issues, use jacks for access, and assist with engine and transmission work. The role requires 2+ years of diesel experience, proficiency with diagnostic software, and a strong commitment to accurate documentation and safety standards.