Process Maintenance Technician

About Mariana Minerals

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 Lisbon Valley Mining Company, a producing open-pit copper mine in southeastern Utah running 24/7.

As a Process Maintenance Technician, you'll maintain and repair everything that's "nailed to the ground": pumps, compressors, boilers, piping, valves, and the buildings that keep the operation running. The ideal candidate is strong in at least one area, such as pumps, welding, or troubleshooting, and is ready to cross-train in the rest.

Responsibilities

• Diagnose, install, and repair fixed plant equipment, including pumps, compressors, boilers, fans, motors, gearboxes, piping, valves, and automated valves, identifying root causes.
• Maintain site buildings and infrastructure, including truck shops, admin buildings, and plumbing systems, along with portable equipment such as mobile air compressors and pumps.
• Perform welding and fabrication for pipe, frames, handrails, grating, and structural repairs.
• Perform equipment rebuilds, component replacements, lubrication, inspections, oil sampling, and other preventive and condition-based maintenance.
• Perform basic electrical troubleshooting and repair on motors, starters, and controls, and work alongside electricians to rack out, unwire, install, and troubleshoot process equipment.
• Safely operate forklifts, overhead cranes, boom trucks, and other material-handling equipment.
• Document inspections, repairs, and parts in work orders and the CMMS.
• Follow MSHA regulations, lockout/tagout procedures, PPE requirements, and company SOPs.

Qualifications

• 2+ years of maintenance experience in fixed plant, mining, industrial, or heavy manufacturing environments.
• Strong hands-on skills in at least one area: pumps, welding and fabrication (MIG, stick, cutting), or mechanical troubleshooting.
• Working knowledge of pumps, motors, gearboxes, piping systems, and mechanical drive systems.
• Basic electrical knowledge, including reading wiring diagrams, using a multimeter, and troubleshooting motors and controls. Industrial electrical experience is a plus.
• Ability to read and interpret service manuals, parts manuals, schematics, and technical documentation.
• Ability to work safely in an active mine environment and perform physically demanding tasks.
• Experience using computerized maintenance management systems (CMMS).
• Strong communication skills and ability to work effectively with operators, electricians, and support teams.
• Working Environment and Schedule
• Schedule: 7 days on / 7 days off, 12-hour shifts, rotating between days and nights.
• Housing & Relocation: Housing and relocation assistance options are available.
• Able to walk rough terrain, climb, and lift 50+ lbs in all weather conditions.
• Exposure to dust, fumes, and chemicals (including sulfuric acid); full PPE required.
• Our culture is built on four principles: Everyone Gets Home Safe.
• We never put speed or cost ahead of people.
• Extreme Ownership.
• We take full responsibility for outcomes, relentlessly driving toward solutions.
• Engineer Out Requirements, then Automate.
• We simplify, optimize, and then automate for scale.
• Share Your Legos.
• We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.
• Join us as we build the future of responsible mineral sourcing and supply!