Process Maintenance Technician

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.

The Process Maintenance Technician is a hands-on role responsible for inspecting, troubleshooting, repairing, and maintaining fixed plant equipment and process systems that support Lisbon Valley’s crushing and heap leach operations. Equipment may include crushers, conveyors, pumps, piping, valves, motors, solution-handling systems, and other processing infrastructure.

The ideal candidate brings strong mechanical troubleshooting skills, experience maintaining mining or industrial process equipment, and a strong commitment to safety. This role supports production by reducing downtime, improving equipment reliability, maintaining system integrity, and helping ensure safe and efficient plant operation.

• Perform diagnostics, maintenance, installation, and repair of fixed plant equipment and associated systems, including pumps, compressors, boilers, fans, and valves.

• Perform diagnostics, installation, preventive maintenance, troubleshooting, and repair of fixed plant equipment, including pumps, motors, gearboxes, compressors, boilers, fans, valves, and associated process systems.

• Perform equipment rebuilds, component replacement, lubrication, inspections, adjustments, oil sampling, and other preventive and condition-based maintenance activities.

• Complete welding and fabrication as needed and safely operate forklifts, overhead cranes, boom trucks, and other material-handling equipment.

• Read and interpret service manuals, parts manuals, schematics, and technical documentation to support accurate troubleshooting and repairs.

• Perform fixed plant, mining, industrial, or heavy manufacturing maintenance, including troubleshooting and repair of hydraulic systems and mechanical equipment.

• Maintain accurate work orders and maintenance records, coordinate effectively with operations and support teams, and perform all work in accordance with MSHA regulations, company procedures, and PPE requirements.