Lead Field Service Mechanic — Onsite Diagnostics

North American Transportation Management Institute; Benicia (CA); On-site; USD 55,000 - 66,000; Full time

Benefits offered by this job

Medical, Dental, and Vision Coverage

401(k) plan with company match

Paid Time Off

Job summary

Herc Rentals in Benicia, CA is seeking a Field Service Mechanic A to lead fleet maintenance and repair on customer sites. As a master technician, you will apply preventative maintenance, run diagnostic tests, and mentor B and C level mechanics while ensuring equipment remains on the rental 'ready line'.

You will manage oil changes, hydraulic and electrical repairs, and safety compliance, while producing detailed service reports.

Qualifications

• High School Diploma or equivalent required.
• Proficiency with diagnostic tools and fleet management systems preferred.
• Demonstrated mastery of field service tasks and safety requirements.

Responsibilities

• Maintain PM schedules for Herc-owned fleet at active job sites.
• Operate/test equipment onsite to confirm quality standards before and after repairs.
• Independently perform routine maintenance and repairs on fleet equipment and trucks.
• Perform oil changes, lubrication, tire/hose/battery replacements, and related field services.
• Recondition/replace heavy equipment parts and diagnose wear/tear onsite.
• Keep service truck and inventory clean, organized, and stocked.
• Produce detailed service reports and repair logs per visit.
• Follow field procedures, protocols, and safety requirements; other duties as assigned.
• Diagnose engines, DC electrical, propane, hydraulic, and fuel systems onsite.
• Repair using electrical schematics; inspect overvoltage protection and indicator lights.
• Replace/diagnose control modules; reprogram firmware/software via laptop/tablet tools.
• Apply computer-controlled diagnostics to resolve electrical issues without branch return.
• Diagnose lithium electrical issues, intermittent faults, and post-fire failure analysis.
• Diagnose/repair safety-critical circuits to restore equipment onsite; install aftermarket electrical components.
• Diagnose DPF/DEF system issues; troubleshoot and calibrate mechanical, electronic, and power loss issues.
• Conduct failure analysis supporting policy review and warranty eligibility.
• Analyze/test lubrication systems; replace injectors and common rail components.
• Repair/reseal hydraulic cylinders; diagnose pumps, motors, wiring, sensors.
• Inspect lithium battery charging; recalibrate aerial systems; perform annual aerial inspections.
• Service emission control components, including DPF.
• Diagnose pressure loss, overheating, sluggish movement.
• Use computerized tools to trace electrical faults, connections, switches, sensors, and safety interlocks.
• Assist shop lead with damage estimates, repairs, and documentation onsite.
• Take service calls in shop lead's absence; dispatch/coordinate Field Service Mechanics for timely repairs.
• Assist training Field Service Mechanic B/C techs under shop lead direction.
• Enter/review work orders and order parts via fleet management system from the field.
• Serve as primary customer contact onsite, maintaining a professional, responsive presence.

Skills

Electrical systems

Hydraulic systems

Field leadership

Customer liaison

Diagnostic tools

Education

High School Diploma

Tools

Diagnostic tools

Fleet management systems

Job description

Herc Rentals in Benicia, CA is seeking a Field Service Mechanic A to lead fleet maintenance and repair on customer sites. As a master technician, you will apply preventative maintenance, run diagnostic tests, and mentor B and C level mechanics while ensuring equipment remains on the rental 'ready line'.

You will manage oil changes, hydraulic and electrical repairs, and safety compliance, while producing detailed service reports.