Senior Ready Mix Mechanic

Martin Marietta • Prescott, AZ

6d • Onsite

About The Position

The Senior Mechanic is a high-level technical and leadership role responsible for ensuring the peak operational efficiency, safety, and reliability of the Ready-Mix fleet and associated mobile equipment. This position goes beyond standard repairs, requiring advanced diagnostic capabilities and the ability to lead daily shop activities. You will oversee the maintenance of on-highway diesel trucks (specifically mixers), front-end loaders, and support equipment, minimizing downtime through proactive planning and expert-level mechanical execution. As a 'Senior' team member, you are expected to mentor junior mechanics, manage work orders, and strictly uphold Martin Marietta’s world-class safety culture.

Requirements

• 3+ years of Heavy Equipment or On-Highway Truck Maintenance experience.
• Mechanical analysis
• Design tools
• Mechanical controls
• Mechanical diagrams and blueprints
• General knowledge of heavy equipment operations, systems and components (engines, electrical, hydraulic, mechanical, pneumatic), repair methods, and common issues.
• Mechanical theory
• OSHA regulations and compliance
• Troubleshooting
• LOTO lockout/tagout
• Effective communicator (written and spoken)
• Detail oriented
• Time management

Nice To Haves

• Direct experience with Ready-Mix concrete trucks and their specialized hydraulic/mechanical components is a significant advantage.

Responsibilities

• Utilize advanced computer diagnostic software and precision testing equipment to identify and resolve complex issues in diesel engines, transmissions, and electronic control systems.
• Lead the dismantling, overhauling, and reassembling of major components, including engines, power trains, and specialized hydraulic systems unique to concrete mixers.
• Perform expert-level repairs on air brake systems (ensuring full DOT compliance) and heavy-duty suspension/steering components.
• Execute high-quality welding, cutting, and metal fabrication for equipment modifications or structural repairs.
• Diagnose and repair specialized mixer components, including drums, rollers, high-pressure water systems, and hydraulic drives.
• Assist the Manager in scheduling daily shop tasks, validating timecards, and ensuring the accuracy and quality of all repairs performed by the team.
• Function as a technical resource for junior mechanics and drivers; provide 'on-the-tool' training to improve the overall skill level of the fleet department.
• Proactively research and order parts, maintaining an organized inventory to ensure critical spares are available, reducing equipment 'wait time.'
• Implementation and enforcement of Martin Marietta Health and Safety standards, including Guarding, Lock-Out/Tag-Out (LOTO), and Fall Protection.
• Conduct thorough OSHA pre-shift inspections and annual vehicle evaluations to ensure all equipment meets federal and state regulatory requirements.
• Maintain meticulous digital and physical logs of all maintenance activities, PM schedules, and work orders to ensure audit readiness.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Associate degree