Field Mechanic

Martin Marietta; Denver (CO); On-site; USD 40,000 - 57,000; Full time

Job summary

Martin Marietta is seeking a Field Mechanic to perform high-level maintenance, diagnostics, and repair of asphalt plant equipment, crushers, and heavy mobile machinery in field settings. The role travels to operating sites and supports uptime with a safety-first approach, working independently in varied outdoor conditions.

Responsibilities include diagnosing and repairing diesel equipment, wiring and hydraulic systems, and performing preventive maintenance in accordance with manufacturer specs

Qualifications

• Mechanical analysis, design tools and controls knowledge for field repairs.
• Ability to read mechanical diagrams and blueprints to guide troubleshooting.
• Familiarity with heavy equipment, hydraulic/pneumatic systems, and electrical schematics.

Responsibilities

• Inspect, diagnose, and repair asphalt plant components and conveyors.
• Perform mechanical repairs on diesel mobile equipment including engine/transmission work.
• Use cutting torches and welders for field fabrication and modifications.
• Execute scheduled PMs and lubrication per specs and maintenance module.
• Conduct oil sampling, filter changes, and pressure testing to preempt failures.
• Maintain accurate work documentation of parts, status, and health.
• Troubleshoot hydraulic, pneumatic, and electrical systems to resolve issues.
• Use CAT ET and scanners to analyze engine performance and faults.
• Interpret manuals and schematics to perform precise repairs.
• Participate in SLAM and pre-shift safety inspections, adhering to LOTO rules.

Skills

Mechanical analysis

Design tools

Mechanical controls

Mechanical diagrams

Mechanical test equipment design

Mechanical theory

Heavy equipment operations

OSHA compliance

Troubleshooting

Detail oriented

Problem solving

Time management

Effective communicator

Education

Vocational training or relevant experience

Tools

CAT ET

Scanners

Job description

This individual will primarily be responsible for the safe repair, planned, and preventative maintenance of rock crusher machines and other fixed plant equipment at our operating sites.

JOB SUMMARY

The Field Mechanic is a critical role responsible for the high-level maintenance, diagnostic troubleshooting, and repair of both stationary asphalt plant equipment, mobile heavy machinery, and on-road assets. This position operates primarily in the field, traveling to various plant sites to ensure maximum operational uptime and efficiency. As a key member of the maintenance team, the Field Mechanic must embody Martin Marietta’s 'Safety First' culture, prioritizing a zero-incident environment while performing complex mechanical, hydraulic, and electrical repairs. The role requires a highly motivated individual capable of working independently in various outdoor environments to support the production of hot mix asphalt materials.

KEY DUTIES AND RESPONSIBILITIES

• Inspect, diagnose, and repair asphalt plant components, including conveyor systems, shakers, screens, pumps, gearboxes, crushers, and burners.
• Perform skilled mechanical repairs on diesel-powered mobile equipment (loaders, haul trucks, pavers) including engine rebuilds, transmission repairs, and the removal/installation of major mechanical parts.
• Utilize cutting torches, welders (MIG/TIG/Stick), and grinders to perform field fabrication, structural repairs, and equipment modifications.
• Execute scheduled PM services and lubrication protocols according to manufacturer specifications and Martin Marietta’s Maintenance Module.
• Conduct oil sampling, filter changes, and pressure testing to identify potential failures before they occur.
• Maintain accurate electronic and paper documentation of all work performed, materials used, and equipment health status.
• Perform intermediate to advanced troubleshooting of hydraulic, pneumatic, and electrical systems.
• Use diagnostic software and tools (CAT ET, scanners) to analyze engine performance and system faults on modern heavy equipment.
• Interpret technical manuals, blueprints, and hydraulic/electrical schematics to execute precise repairs.
• Actively participate in all safety initiatives, including SLAM (Stop, Look, Analyze, Manage) and pre-shift safety inspections of work areas and equipment.
• Conduct mandatory OSHA pre-shift safety inspections of work areas and equipment.
• Strictly adhere to Lock-Out/Tag-Out (LOTO) procedures and all company safety initiatives (Guardian Angel Creed).
• Actively participate in the hazard recognition program by documenting near-misses and implementing safety improvements.
• Maintain a clean and organized service truck and work area to prevent hazards and ensure environmental compliance.
• Collaborate with Plant Managers and Superintendents to prioritize backlogs and minimize production downtime.
• Operate support equipment such as cranes, man-lifts, loaders, and haul trucks in a safe and efficient manner.
• Mentor and coach junior maintenance staff and plant operators on best practices for equipment care and minor repairs.

QUALIFICATIONS

Education

Vocational training or relevant experience

Work Experience

1+ years of experience in Heavy Equipment Maintenance specifically with brands such as CAT, Komatsu, Volvo, or John Deere. Asphalt experience is preferred.

Knowledge, Skills, and Abilities

• Mechanical analysis
• Design tools
• Mechanical controls
• Mechanical diagrams and blueprints
• Mechanical test equipment design
• Mechanical theory
• Heavy equipment operations (engines, electrical, hydraulic, mechanical pneumatic)
• OSHA compliance and regulations
• Troubleshooting
• Detail oriented
• Problem solving
• Time management
• Effective communicator (written and spoken)

ADDITIONAL DETAILS

Physical Requirements

• Must be able to lift and carry up to 50 lbs. for plant maintenance and equipment servicing.
• Required to bend, stoop, climb, and reach.
• You must be able to maintain three points of contact when climbing on/off machinery or on ladders.
• Strong hand-eye-foot coordination is essential for operating hand/foot controls.
• You must have good depth perception with or without seeing aid for distances up to 150 feet.

Working Conditions

All duties require outside assignments and require periods of work in all weather conditions, cold, wet, dry and dusty.and Must be able to work in areas where noise levels are up to 85 dbs. Must supply own working set of mechanical tools (check with local shop for specific details).

Union

We are excited to share the base hourly rate for this position is $35.44+. Membership with the International Union ofand Operating Engineers Local Union No, 9and is required upon hire. Condition and terms of employment and benefits are in accordance with the collective bargaining agreement.