Semi-Truck & Trailer Maintenance Technician

Synagro Open Positions; Hampshire Township (IL); On-site; USD 52,000 - 76,000; Full time

Job summary

Synagro is seeking a skilled Semi-Truck & Trailer Maintenance Technician to perform inspections, preventive maintenance, diagnostics, repairs, and troubleshooting of commercial trucks, trailers, and related equipment. The role emphasizes safety, quality, and minimizing downtime.

The ideal candidate has strong mechanical aptitude, experience with diesel-powered equipment, and a commitment to accurate documentation and teamwork in a fast-paced shop environment. This is an on-site role in Illinois.

Qualifications

• High school diploma or GED required.
• Minimum 2 years of experience maintaining and repairing semi-trucks and trailers.
• Knowledge of diesel engines, air brake systems, electrical systems, and trailer components.
• Ability to read and interpret technical manuals, schematics, and repair procedures.
• Welding and fabrication experience preferred.
• Valid driver's license; CDL preferred.
• Ability to lift up to 75 pounds and perform physically demanding work in a shop environment.

Responsibilities

• Perform preventative maintenance services on semi-trucks, trailers, and fleet equipment.
• Diagnose and repair mechanical, electrical, hydraulic, pneumatic, and suspension system issues.
• Repair diesel engines, transmissions, clutches, brakes, steering components, and driveline systems.
• Inspect, repair, and replace trailer components including landing gear, lighting systems, and air systems.
• Troubleshoot and repair ABS brake systems and air brake components.
• Perform welding, fabrication, and minor body repairs as needed.
• Complete tire inspections, repairs, replacements, and wheel-end maintenance.
• Conduct DOT inspections and ensure vehicles comply with federal, state, and company regulations.
• Complete work orders and maintenance logs.

Skills

Diagnostics

Independent worker

Team player

Time management

Education

High school diploma or GED

Tools

Fleet maintenance software

Electronic work orders

Job description

POSITION SUMMARY:

We are seeking a skilled and dependable Semi-Truck & Trailer Maintenance Technician to perform inspections, preventative maintenance, diagnostics, repairs, and troubleshooting of commercial trucks, trailers, and related equipment. The ideal candidate will have strong mechanical aptitude, experience with diesel-powered equipment, and a commitment to safety, quality, and minimizing equipment downtime.

ESSENTIAL FUNCTIONS:

Repairs & Maintenance

• Perform preventative maintenance services on semi-trucks, trailers, and fleet equipment.
• Diagnose and repair mechanical, electrical, hydraulic, pneumatic, and suspension system issues.
• Conduct repairs on diesel engines, transmissions, clutches, brakes, steering components, and driveline systems.
• Inspect, repair, and replace trailer components including, landing gear, lighting systems, and air systems.
• Troubleshoot and repair ABS brake systems and air brake components.
• Perform welding, fabrication, and minor body repairs as needed.
• Complete tire inspections, repairs, replacements, and wheel-end maintenance.
• Conduct DOT inspections and ensure vehicles comply with federal, state, and company regulations.

Equipment Inspections

• Perform pre-service and post-repair inspections to verify equipment condition and operational readiness.
• Identify potential maintenance concerns before equipment failures occur.
• Accurately document inspection findings and repair recommendations.

Safety & Compliance

• Follow OSHA, DOT, and company safety standards at all times.
• Maintain a clean, organized, and safe work environment.
• Properly handle and dispose of hazardous materials, fluids, and waste products.
• Ensure all maintenance records are completed accurately and on time.

Documentation & Communication

• Complete work orders, repair reports, and maintenance logs.
• Communicate equipment status, repair needs, and estimated completion times to supervisors and operations personnel.
• Assist with maintenance planning and scheduling to maximize equipment availability.
• This is a summary of principal responsibilities and is not intended to include all duties, which may be assigned.

COMPENTENCIES:

• Organizing: Uses resources effectively and efficiently.
• Peer Relationships: Is seen as a team player and is cooperative.
• Flexibility: Is very flexible and adaptable, can act differently depending upon the situation.
• Time Management: Values timeuses his/her time effectively and efficiently.
• Ethics and Values: Adheres to an appropriate and effective set of core values and beliefs during both good and bad times.
• Integrity and Trust: Admits mistakes and is seen as a direct, truthful individual.

PREFERRED SKILLS:

• Strong diagnostic and troubleshooting abilities.
• Experience with fleet maintenance software and electronic work order systems.
• Attention to detail and commitment to quality workmanship.
• Ability to work independently and as part of a team.
• Strong organizational and time-management skills.

QUALIFICATIONS:

• High school diploma or GED required.
• Minimum 2 years of experience maintaining and repairing semi-trucks and trailers preferred.
• Knowledge of diesel engines, air brake systems, electrical systems, and trailer components.
• Ability to read and interpret technical manuals, schematics, and repair procedures.
• Welding and fabrication experience preferred.
• Valid driver's license required; CDL preferred.
• Ability to lift up to 75 pounds and perform physically demanding work in a shop environment.