Project Engineer

Mariana Minerals • Moab, UT

21d • Onsite

About The Position

Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying critical minerals for modern energy, AI, and defense technologies. The Project Engineer designs and deploys first-of-a-kind mining and refining technologies at the company’s Moab site. Working across process development, software, plant engineering, project execution, and operations teams, this role plans, builds, and delivers cross-functional projects. Work ranges from scoping projects and sizing equipment to supporting mechanics and electricians during startup. The Project Engineer owns projects from idea through handover and develops new skills along the way.

Requirements

• Process or mechanical engineering experience in mining, chemical, oil and gas, or other heavy industrial operations, with 4 or more years of experience.
• Hands-on experience taking projects from design through commissioning and startup.
• Comfort reading and producing P&IDs, PFDs, and equipment datasheets.
• Comfort working independently and willingness to take on unfamiliar problems.
• Ability to work in the processing plant in all weather conditions, including extreme temperatures, and with exposure to fumes, dust, diesel, solvents, sulfuric acid, and other hazardous materials.
• Ability to stand, climb, bend, and kneel for extended periods, including working at heights and in tight spaces.
• Adequate visual acuity, depth perception, and hearing, with correction or aids if needed, to work safely around operating equipment.
• Ability to lift a minimum of 50 pounds.
• Ability to wear required PPE on site, including a hard hat, safety glasses, steel-toe boots, hearing protection, and respiratory protection when needed.

Nice To Haves

• Bachelor’s degree in Mechanical Engineering, preferably, or another related engineering degree.
• Strong data skills; experience with process data historians, Python, or similar tools.
• Experience with hydrometallurgy, leaching, solvent extraction, or electrowinning.
• EIT or PE.

Responsibilities

• Scope, design, and lead process improvement and capital projects from concept through commissioning.
• Develop process flow diagrams, P&IDs, mass and energy balances, and equipment specifications.
• Size and select pumps, tanks, piping, and other process equipment.
• Use plant data to identify bottlenecks, improve recovery, and reduce costs.
• Work with the project mechanic and project electrician on installations, checkout, and startup.
• Partner with controls and operations teams on control strategies and operating procedures.
• Lead hazard reviews and management of change, and ensure projects comply with site safety standards.
• Manage project scope, schedule, and budget, including vendor and contractor coordination.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level