Chemical Engineering Intern

Mariana Minerals • Houston, TX

1d

About The Position

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.

We are hiring a Chemical Engineering Intern to work on real, high-impact problems within the Process & Plant Engineering team. You will contribute directly to our LithiumOne project, working closely with engineers and domain experts.

This role is designed to provide hands-on experience building and shipping solutions, not just supporting tasks.

Requirements

• Currently pursuing a B.S. or M.S. in Chemical Engineering, with coursework in thermodynamics, mass transfer, and reaction engineering
• Strong analytical and technical writing skills; ability to synthesize data into clear engineering summaries

Nice To Haves

• Familiarity with process simulation tools (e.g., METSIM, Aspen, or similar) is an asset
• Interest in hydrometallurgy, critical minerals, or battery materials supply chains preferred
• Proficiency in Excel for data analysis; experience with Python or MATLAB a plus

Responsibilities

• Support development and refinement of process flow diagrams (PFDs) and piping & instrumentation diagrams (P&IDs) for a lithium brine extraction and purification flowsheet
• Assist with mass and energy balance modeling across key unit operations including evaporation, impurity removal, and lithium product conversion
• Conduct literature reviews and vendor engagement to evaluate reagent selection, membrane technologies, and downstream processing options
• Support preparation of engineering deliverables for feasibility and prefeasibility studies, including input to equipment sizing and capital cost estimation
• Assist with laboratory or pilot-scale test work data analysis to validate process assumptions and inform flowsheet optimization

What This Job Offers

• Career Level: Intern