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About the Role

Mariana Minerals is seeking a highly motivated Materials Engineer to join our R&D and product development team. This position will play a critical role in translating laboratory discoveries into scalable, economically viable production processes.

Responsibilities

• Conduct lab-scale and pilot scale wet chemical synthetic experiments to validate proof-of-concept ideas and develop new material formulations.
• Design and execute experiments to establish reaction parameters, yield optimization, and reproducibility.
• Evaluate and select equipment and process configurations for pilot-scale and commercial-scale operations.
• Develop process flow diagrams (PFDs), process and instrumentation diagrams (P&IDs), and mass/energy balances.
• Collaborate with multidisciplinary teams including R&D scientists, operations, and external vendors to ensure smooth scale-up.
• Support process safety reviews, risk assessments, and environmental compliance planning.
• Collect and analyze process data to identify areas for optimization, cost reduction, and performance improvement.
• Prepare technical documentation, reports, and presentations for internal and external stakeholders.
• Work closely with cross-functional teams including lab technicians, pilot plant engineers, process engineers, project execution teams, and more to scale designs from lab through to commercial scale.
• Work closely with the software and machine learning teams to automate capital project execution workflows and develop reactor and plant optimization algorithms.

Requirements

• MS degree in Materials Science, Chemistry, Materials Engineering, or Chemical Engineering (PhD preferred).
• Hands-on experience in materials synthesis (e.g., solid-state, hydrothermal, precipitation, or other chemical synthesis techniques).
• Proficiency with materials characterization tools such as XRD, SEM, TEM, BET, TGA/DSC, and spectroscopic methods.
• Experience with process design, equipment specification, and scale-up of laboratory processes to pilot or production scale.
• Strong analytical and problem-solving skills with a data-driven approach.
• Excellent communication and teamwork skills in a multidisciplinary environment.
• Familiarity with process simulation tools (e.g., OLI systems or equivalent) is a plus.

Skills

• Materials Synthesis
• Materials Characterization
• Process Design
• Equipment Specification
• Scale-up
• Analytical Skills
• Problem-Solving
• Data-Driven Approach
• Communication Skills
• Teamwork
• Process Simulation

Education Level

• MS degree in Materials Science, Chemistry, Materials Engineering, or Chemical Engineering (PhD preferred).

About the Company

• 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.
• Our culture is built on three principles: Extreme Ownership, Engineer Out Requirements, then Automate, and Share Your Legos.
• Join us as we build the future of responsible mineral sourcing and supply.