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.

The Role

We are hiring a Field Engineering Intern to work on real, high-impact problems within the Project Execution Team. You will contribute directly to the construction of the Lithium One refinery, working closely with engineers and domain experts. This role is designed to provide hands-on experience building and shipping solutions, not just supporting tasks.

What You’ll Do

• Work on the construction execution of a greenfield Lithium One Refinery including working with subcontractors, vendors, scheduling and budgeting resulting in successful execution of scopes.

• Build, test, and iterate on solutions within MarianaOS including developing world class tracking and development of a software driven construction team.

• Analyze data and field systems to identify inefficiencies, track progress against schedule, and optimize construction performance.

• Collaborate with cross-functional team members including engineering, operations, and construction contractors to coordinate scope and resolve field issues.

• Present outcomes, key learnings, and recommendations to the Project Execution Team at the end of the internship.

Desired Qualifications

• Currently pursuing a degree in Civil Engineering, Construction Engineering, or Construction Management.

• Strong fundamentals in construction sequencing, reading drawings and specifications, and basic project controls.

• Hands-on experience in construction, scheduling, estimating, or project management through coursework, prior internships, or field work.

• Ability to break down complex field problems, prioritize tasks, and execute independently in a fast-paced environment.

• Clear verbal and written communication skills with a strong willingness to learn and adapt in a dynamic construction setting.

Why Join Us?

At Mariana Minerals, you’ll be part of a mission-driven team reshaping the way critical minerals are sourced and supplied globally. You’ll have the autonomy to make big decisions, the tools to innovate, and a culture that values ownership, smart automation, and collaboration.

Our culture is built on three principles:

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.

Mariana is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected status.