Project Engineer
- Level
- Mid
- Work type
- On-site · Moab
Not stated in the posting: salary, visa.
Open. First seen 19 October 2026.
About the role
About Mariana Minerals
Mariana Minerals's standard text
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 Project Engineer designs and deploys first-of-a-kind mining and refining technologies at our Moab site. In this role, you will work across Mariana's process development, software, plant engineering, project execution, and operations teams to plan, build, and deliver the cross-functional projects that move our plant forward. The work varies week to week, from scoping a project and sizing equipment to standing beside the mechanic and electrician during startup. You will own projects from idea to handover and build new skills along the way.
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 find bottlenecks, improve recovery, and cut costs
- Work with the project mechanic and project electrician on installs, checkout, and startup
- Partner with controls and operations teams on control strategies and operating procedures
- Lead hazard reviews and management of change, and keep projects compliant with site safety standards
- Manage project scope, schedule, and budget, including vendor and contractor coordination
Qualifications & Experience
- Bachelor's degree in Mechanical Engineering preferred or another related engineering degree
- Process or mechanical engineering experience in mining, chemical, oil & gas, or other heavy industrial operations, 4+ years
- Hands-on experience taking projects from design through commissioning and startup
- Comfort reading and producing P&IDs, PFDs, and equipment datasheets
- Strong data skills; experience with process data historians, Python, or similar tools is a plus
- Experience with hydrometallurgy, leaching, solvent extraction, or electrowinning is a plus
- Comfort working independently and a willingness to jump into unfamiliar problems
- EIT or PE is a plus
Schedule
- Monday-Friday Days
- Occasional weekends based on project needs
Working Environment & Physical Requirements
- Work in the processing plant in all weather conditions, including extreme temperatures, with exposure to fumes, dust, diesel, solvents, sulfuric acid, and other hazardous materials
- Able to stand, climb, bend, and kneel for extended periods, including work 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 at all times on site, including hard hat, safety glasses, steel-toe boots, hearing protection, and respiratory protection when needed
Mariana Minerals's standard text
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!
What this role asks for
Standard for software engineering roles
Python
Common in software engineering postings at any company.
77% of this description is written for the role. The rest is Mariana Minerals's standard text, folded away below.
Compared with Mariana Minerals's other open jobs.
The team: Plant Operations HIRES STEADILY
This role is one of 11 open in Plant Operations. 4 were posted in the last 30 days and the oldest in March: a team that hires all year rather than one being built.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Cybersecurity (1 of 11), PLC (1 of 11), Python (1 of 11)
OTHER ROLES ON THIS TEAM
- Commissioning Engineer posted Oct 15
- Senior Safety Engineer posted Oct 13
- Sr. Regional Permitting and Compliance Environmental Engineer posted Oct 6
- Sr. Environmental Engineer posted Sep 16
- Mobile Maintenance Supervisor posted Sep 9
- Process Engineer posted Aug 24
- Analytical Applications Engineer posted Aug 12
- Director of Mining and Technical Services posted Jul 30
- Process Safety Engineer posted Jul 7
- IT Technician posted Mar 24
From the team and dates on Mariana Minerals's own job board.
Salary context
31 other open postings titled Project Engineer state a salary: median USD 80,000 to USD 102,000 a year.
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