Mechanic - Hazmat

Truck & Fuel Tanker Mechanic

Department: Transportation / Fleet Maintenance

Reports To: Fleet Manager / Operations Management

Employment Type: Full-Time

Location: San Antonio, Texas

The Truck & Fuel Tanker Mechanic is responsible for inspecting, maintaining, diagnosing, and repairing company-owned tractors and DOT-regulated petroleum tanker trailers used to transport gasoline, diesel, and other hazardous materials.

This position plays a critical role in maintaining fleet reliability, driver safety, regulatory compliance, and equipment availability. The Mechanic is responsible for preventive maintenance, mechanical and electrical troubleshooting, cargo tank inspections and testing, accurate maintenance records, and ensuring tractors and tanker trailers are maintained in safe operating condition and ready for dispatch.

Because the fleet transports hazardous materials, the position requires a strong commitment to safety, attention to detail, and compliance with applicable DOT, FMCSA, PHMSA, and hazardous-material transportation requirements.

• Perform preventive maintenance and repairs on company tractors and related equipment.
• Diagnose and repair diesel engines, air brake systems, suspension, steering, electrical systems, lighting, cooling systems, and other mechanical components.
• Conduct routine oil changes, lubrication, filter replacement, fluid inspections, and scheduled maintenance.
• Diagnose mechanical and electrical problems using appropriate diagnostic equipment.
• Inspect and repair air lines, brake chambers, slack adjusters, wheel-end components, tires, batteries, and related equipment.
• Identify equipment deficiencies before they result in roadside failures or out-of-service conditions.
• Coordinate major repairs or warranty work with outside vendors when necessary.

• Inspect, maintain, and repair DOT specification cargo tank trailers used for petroleum transportation.
• Inspect and repair valves, piping, vents, manholes, emergency shutoff systems, vapor recovery components, hoses, fittings, and related tanker equipment.
• Inspect trailer braking, suspension, lighting, electrical, landing gear, tires, and wheel-end systems.
• Identify leaks, damaged components, worn seals, defective valves, or other conditions that could affect the safe transportation of hazardous materials.
• Perform or assist with required cargo tank inspections and testing in accordance with applicable DOT/PHMSA requirements and company procedures.
• Perform V&K inspections/testing on petroleum cargo tank trailers when properly trained, qualified, and authorized.
• Perform or assist with cargo tank pressure testing
  , including inspection of valves, piping, fittings, closures, and other components associated with maintaining cargo tank integrity.
• Identify and document deficiencies discovered during V&K inspections, pressure testing, or other required cargo tank inspections.
• Complete required repairs and verify deficiencies have been corrected before equipment is returned to service.
• Maintain required inspection, testing, and repair documentation for each cargo tank.
• Coordinate third-party testing or specialized repairs when work cannot be performed internally.
• Ensure repairs affecting cargo tank integrity or hazardous-material systems are completed in accordance with applicable regulatory requirements and company procedures.

• Perform scheduled preventive maintenance on tractors and tanker trailers.
• Conduct DOT annual inspections when properly qualified and authorized.
• Review driver DVIRs and promptly investigate reported equipment defects.
• Prioritize safety-related defects and equipment that may create an out-of-service condition.
• Perform post‑repair inspections and verify equipment is safe before returning it to service.
• Maintain an organized preventive maintenance schedule for tractors and trailers.
• Monitor upcoming DOT inspections, V&K testing, pressure testing, and other required cargo tank inspection dates to prevent equipment from operating beyond required inspection intervals.

• Maintain accurate maintenance and repair records for tractors and trailers.
• Document preventive maintenance, inspections, repairs, parts replacement, and equipment condition.
• Maintain required records for V&K inspections, cargo tank pressure testing, DOT inspections, and other applicable cargo tank tests and inspections
  .
• Ensure equipment…