Field Mechanic

00002 Martin Marietta Materials, Inc.; United States; On-site; USD 40,000 - 57,000; Full time

Job summary

Martin Marietta Materials, Inc. seeks a Field Mechanic to perform safe repair, planned and preventative maintenance of rock crusher machines and fixed plant equipment at operating sites. The role involves field deployment, diagnosing complex mechanical, hydraulic, and electrical systems to maximize uptime.

You will travel to plant sites, perform PMs, use welding and cutting tools, and document all work and equipment health status while adhering to safety protocols and LOTO procedures.

Qualifications

• Vocational training or relevant experience.
• CDL Class A preferred.
• 1+ years of heavy equipment maintenance experience with CAT/Komatsu/Volvo/John Deere; asphalt experience preferred.

Responsibilities

• Inspect, diagnose, and repair asphalt plant components such as conveyors, shakers, screens, pumps, gearboxes, crushers, and burners.
• Perform skilled mechanical repairs on diesel-powered mobile equipment including engine rebuilds and transmission repairs.
• Utilize torches, welders (MIG/TIG/Stick), and grinders for field fabrication, structural repairs, and modifications.
• Execute scheduled PM services and lubrication protocols per manufacturer specifications and Martin Marietta’s Maintenance Module.
• Conduct oil sampling, filter changes, and pressure testing to identify potential failures.
• Maintain accurate documentation of 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.
• Interpret manuals, blueprints, and hydraulic/electrical schematics to execute precise repairs.
• Participate in safety initiatives, OSHA inspections, and LOTO procedures.
• Maintain a clean service truck and work area; collaborate with plant management to prioritize backlogs.

Skills

Mechanical analysis

Design tools

Mechanical controls

Blueprints

Equipment design

Mechanical theory

Heavy equipment ops

OSHA compliance

Troubleshooting

Detail orientation

Problem solving

Time management

Effective communicator

Education

CDL Class A

Tools

CAT ET

Scanners

Job description

JOB SUMMARY

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. 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 CDL Class A, preferred 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.andnbsp;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 ofandnbsp;Operating Engineers Local Union No, 9andnbsp;is required upon hire. Condition and terms of employment and benefits are in accordance with the collective bargaining agreement.

Every member of our ONE Martin Marietta team is driven by our shared values of safety, integrity, excellence, community and stewardship. We are a member of the S&P 500 Index and a leading supplier of aggregates and heavy building materials. Through a network of operations spanning 29 states, Canada and the Bahamas, our teammates supply the foundational resources on which our communities thrive and grow. Our Specialties business provides high-purity magnesia and dolomitic lime products used worldwide in environmental, industrial, agricultural and specialty applications. In a world that's focused on the power of many, we believe in the power of ONE – the magic of bringing together our unique perspectives, experiences and talents to evolve a shared vision and future. Our backgrounds may vary, but our voices come together in support of the same goals. We want to build legacies for ourselves and our loved ones, strengthen our communities and safely and responsibly engage in work we know will make a difference.