Maintenance Mechanic

Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.

Through its Copper One platform, Mariana Minerals owns and operates the Lisbon Valley Mining Company, a producing open-pit copper mine in southeastern Utah. The operation relies on safe, reliable mobile equipment to support drilling, blasting, loading, hauling, crushing, and heap leach processing.

The Mine Maintenance Mechanic is a hands-on role responsible for diagnosing, repairing, inspecting, and maintaining heavy mobile equipment and support systems in both shop and field environments. The ideal candidate brings strong troubleshooting skills, mining or heavy industrial experience, and a strong safety mindset, with a focus on reducing downtime, improving equipment reliability, and supporting safe, efficient production.

• Perform mechanical, hydraulic, electrical, and pneumatic diagnostics, troubleshooting, and repairs on mobile mining equipment, including haul trucks, loaders, dozers, graders, and ancillary equipment.

• Conduct preventive maintenance, routine inspections, and condition-monitoring activities in accordance with OEM guidelines and established maintenance schedules.

• Diagnose equipment failures, identify root causes, complete corrective repairs, and support reliability initiatives that improve equipment availability and reduce downtime.

• Service and repair auxiliary equipment, including light vehicles, compressors, pumps, generators, and other site equipment as needed.

• Perform maintenance in both shop and field environments, safely operating service trucks, cranes, lifting devices, specialty tools, and diagnostic equipment.

• Accurately document inspections, repairs, parts used, equipment condition, and maintenance activity in work orders, logs, and maintenance systems.

• Follow MSHA regulations, lockout/tagout procedures, PPE requirements, company policies, and equipment-specific SOPs while maintaining safe, organized work areas.

• High school diploma or GED; technical or vocational training in mechanics or maintenance preferred.

• Minimum 3 years of maintenance experience in mining, heavy equipment, construction, industrial, or similar environments.

• Strong working knowledge of diesel engines, hydraulics, drivetrains, electrical systems, and heavy equipment components.

• Ability to read and interpret schematics, service manuals, and diagnostic documentation.

• Proficiency with troubleshooting tools, mechanical testing equipment, and service trucks.

• Strong communication skills and ability to work effectively with operators, supervisors, and technical teams.

• Ability to work safely in an active mine environment and perform physically demanding tasks.

• Experience working on Caterpillar, Komatsu, or other large mining equipment brands.

• Familiarity with computerized maintenance management systems (CMMS).

• Welding and fabrication skills (MIG, stick, cutting).

• Experience performing field repairs in remote or rugged conditions.

• Knowledge of predictive maintenance and equipment health monitoring techniques.