FIELD TECH LEVEL 3

Herin Family Rentals LLC; Spring (TX); On-site; USD 65,000 - 90,000; Full time

Job summary

Herin Family Rentals LLC seeks a Field Mechanic / Level 3 to serve as the senior diagnostic and field-service technician for our rental fleet. You will independently resolve complex mechanical, hydraulic, electrical, and drive-system issues in shop and at customer locations, supporting a dirt-heavy fleet with aerial and material-handling equipment.

You will mentor levels 1 and 2, oversee field-service calls, and participate in ongoing safety and technical trainings to uphold service excellence.

Qualifications

• Five or more years of verifiable heavy-equipment or rental-equipment experience with independent field diagnosis.
• Documented manufacturer, dealer, or technical-school training relevant to equipment.
• Advanced ability to interpret wiring diagrams and diagnostic data.
• Strong customer communication, documentation, time-management, and independent decision-making.
• Valid driver license with clean record; TWIC if required.
• Ability to operate a field-service vehicle and maintain inventory and tools.

Responsibilities

• Perform advanced diagnosis and repair of skid steers, CTLs, mini excavators, telehandlers, aerial lifts in shop and field.
• Diagnose diesel engines, aftertreatment, hydraulics, CAN-bus, and electrical issues.
• Use diagnostic software, wiring diagrams, fault histories, and live data for troubleshooting.
• Verify aerial equipment safety systems and interlocks.
• Manage field-service calls, installations, breakdowns, repairs, and testing.
• Determine onsite repair viability vs. transport to shop.
• Communicate findings professionally to customers.
• Create clear work orders documenting problem, diagnostics, parts, labor, and verification.
• Mentor Level 1-2 techs and reinforce diagnostic practices.
• Participate in manufacturer and safety trainings.

Skills

Field diagnosis

Customer communication

Independent decision-making

Documentation

Time-management

Mentoring

Training

Driver's license

Wiring diagrams interpretation

Education

Industry training/certifications

Tools

Diagnostic software

Diagnostic computers

CAN-bus test tools

Electrical testing tools

Job description

Description

The Field Mechanic / Level 3 is the senior diagnostic and field-service technician for the rental fleet. This position independently resolves complex mechanical, hydraulic, electrical, electronic, emissions, and drive-system problems in the shop and at customer locations. The technician supports a dirt-heavy fleet while maintaining advanced competence on aerial and material-handling equipment and serves as a technical resource for other mechanics.

Requirements

Duties & Responsibilities

• Independently perform advanced diagnosis and repair of skid steers, compact track loaders, mini excavators, telehandlers, aerial lifts, attachments, and related rental equipment in the shop and in the field.
• Diagnose complex diesel engine, aftertreatment, hydraulic, hydrostatic, electrical, CAN-bus, electronic control, final-drive, undercarriage, steering, brake, and structural concerns.
• Use manufacturer diagnostic software, service information, fault histories, live data, wiring diagrams, hydraulic schematics, pressure and flow testing, and systematic troubleshooting procedures.
• Diagnose and verify aerial-equipment safety systems, interlocks, emergency-lowering systems, platform and ground controls, load-sensing systems, and related functions within completed training and authorization.
• Manage field-service calls, onsite installations, breakdown response, repairs, maintenance, testing, and the safe return of equipment to service.
• Determine whether equipment can be safely repaired onsite, must be restricted from operation, or must be transported to the shop.
• Communicate professionally with customers when arriving and departing and explain findings, equipment status, limitations, and next steps without making unauthorized commitments.
• Create clear, complete work orders that document the reported problem, diagnostic process, measurements, root cause, repair, parts, labor, and final verification.
• Mentor Level 1 and Level 2 technicians, assist with difficult repairs, and help reinforce safe, consistent diagnostic practices.
• Participate in and maintain assigned manufacturer, safety, aerial, and technical training.

Qualifications

• Typically, five or more years of verifiable heavy-equipment, construction-equipment, agricultural-equipment, or rental-equipment experience, including independent field diagnosis; demonstrated competency is required regardless of years.
• Documented manufacturer, dealer, technical-school, or industry training relevant to assigned equipment; additional certifications may be required after hire.
• Advanced ability to interpret wiring diagrams, hydraulic schematics, diagnostic flowcharts, service data, fault codes, and live operating information.
• Strong customer communication, documentation, time-management, and independent decision-making skills.
• Valid driver license, clean driving record acceptable to company insurance requirements, and ability to obtain a TWIC card when required.
• Ability to safely operate a field-service vehicle and maintain assigned inventory, tools, fluids, parts, and records.

Core Technical Competencies

• Advanced electrical, electronic, CAN-bus, hydraulic, hydrostatic, diesel, emissions, and powertrain diagnosis.
• Hydraulic pressure and flow testing, electrical voltage-drop and circuit testing, scan-tool analysis, and root-cause verification.
• Dirt-equipment undercarriage, final-drive, attachment, coupler, pin and bushing, auxiliary-hydraulic, and structural evaluation.
• Aerial and telehandler safety circuits, controls, interlocks, emergency systems, and operational testing.
• Safe field repair planning, machine recovery coordination, jobsite hazard assessment, and equipment removal-from-service decisions.
• Technical coaching and verification of completed repairs performed by less-experienced technicians.

Tools and Equipment

• Employee provides a professional personal hand-tool set appropriate for advanced equipment and field repairs, based on the company tool list.
• HFI Rentals provides field-service vehicle; diagnostic computers and software; hydraulic, electrical, lifting, rigging, welding, recovery, specialty, manufacturer-specific, and high-torque tools; and required safety equipment.
• The technician is responsible for the care, inventory, inspection, and secure storage of assigned company tools and equipment.

Work Environment

• Safety is # 1 importance, and policies must be adhered to all times.
• Exposure to heavy machinery and diesel-powered equipment in operation.
• Exposure to outdoor environment and working in varying weather conditions.
• Personal Protective Equipment (PPE) must be worn as needed.
• Lifting heavy parts and materials is required.