About the role
About Mariana Minerals & Copper One Mariana Minerals is a growing natural resources company focused on developing and operating long-life copper assets in stable jurisdictions. Through its Copper One platform, Mariana Minerals owns and operates the Lisbon Valley Mining Company , a producing open-pit copper mine located in southeastern Utah. Lisbon Valley Mining Company utilizes modern surface mining methods—including drilling, blasting, loading, and hauling—to deliver ore to its crushing and heap leach processing facilities. Our success depends on safe, reliable equipment performance, supported by a skilled and safety-focused maintenance team. Position Summary The Mine Maintenance Technician plays a critical hands-on role in ensuring the reliability, safety, and performance of mobile mining equipment and supporting infrastructure. This position performs inspections, troubleshooting, repairs, and preventive maintenance on heavy equipment, support vehicles, and associated systems in both shop and field environments. The ideal candidate has strong mechanical aptitude, experience working in mining or heavy industrial environments, and a commitment to safe work practices. This role directly supports production by minimizing downtime, improving equipment health, and maintaining a safe and efficient operation. Key
Responsibilities Equipment Maintenance & Repair Perform mechanical, hydraulic, electrical, and pneumatic diagnostics and repairs on mobile mining equipment, including haul trucks, loaders, dozers, graders, and ancillary equipment. Conduct preventive maintenance activities in accordance with OEM guidelines and established maintenance schedules. Troubleshoot equipment failures, identify root causes, and implement effective corrective actions. Service and repair auxiliary equipment such as light vehicles, compressors, pumps, and generators. Accurately document all work performed, parts used, and equipment condition. Inspections & Reliability Support Perform routine equipment inspections to identify wear, defects, and emerging mechanical issues. Assist with condition monitoring activities, including fluid analysis, component inspections, and equipment health tracking. Support reliability initiatives aimed at improving equipment availability and reducing unplanned downtime. Work closely with equipment operators to address concerns and verify proper machine operation. Shop & Field Maintenance Activities Perform maintenance work in both shop and field environments, including active mining areas and outdoor conditions. Operate service trucks, cranes, lifting devices, and specialty tools to complete field repairs safely and efficiently. Maintain cleanliness, organization, and safety standards in the maintenance shop and work areas. Assist with plant, facility, and infrastructure maintenance activities as required. Parts, Tools & Documentation Identify required parts and assist with ordering, inventory management, and component tracking. Utilize maintenance systems, work orders, and logs to record inspections, repairs, and equipment hours. Ensure proper care, calibration, and safe use of tools and diagnostic equipment. Safety & Compliance Promote a strong safety culture through safe work practices, proper PPE use, and hazard recognition. Comply with MSHA regulations , company policies, lockout/tagout procedures, and equipment-specific SOPs. Participate in safety meetings, risk assessments, and incident investigations as required. Maintain clean, organized, and hazard-free work areas. Required