Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies. Backed by Khosla and a16z.
About the role
The R&D Metallurgist designs, executes, and analyzes experiments to advance Mariana Minerals' hydrometallurgical testing programs. This hands-on laboratory and pilot-scale role focuses on running DOE protocols, operating tank reactors and mining systems, and analyzing data to optimize extraction for critical minerals. Develop Design of Experiments (DOE) protocols for chemical processing, extraction, and purification
What they're looking for
- Bachelor's degree in Chemistry, Chemical Engineering, Metallurgy, or related technical field preferred
- 5+ years' experience in chemical processing, hydrometallurgy, or laboratory/pilot plant operations
- Experience with Design of Experiments (DOE) methodology and statistical analysis highly desirable
- Hands-on experience with chemical reactors, filtration, and separation equipment
- Advanced Excel proficiency (pivot tables, statistical functions, data visualization)
- Understanding of chemical process fundamentals (mass balance, stoichiometry, reaction kinetics)
More about this role
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 R&D Metallurgist designs, executes, and analyzes experiments to advance Mariana Minerals' hydrometallurgical testing programs. This hands-on laboratory and pilot-scale role focuses on running DOE protocols, operating tank reactors and mining systems, and analyzing data to optimize extraction for critical minerals.
Develop Design of Experiments (DOE) protocols for chemical processing, extraction, and purification
Analyze metallurgical and process data to identify trends, root causes, and optimization opportunities
Operate tank reactors, filtration systems, separation equipment, and purification units at bench and pilot scale
Prepare chemical solutions and reagents according to experimental specifications
Monitor and control process parameters: temperature, pH, flow rates, residence time, and reagent dosing
Perform systematic sampling and material handling...
Browse similar: Startup jobs · San Francisco Bay Area