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R&D Metallurgist

Mariana Minerals· Process Development
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San Francisco HQ$110k - $140kFull-timePosted 1mo ago

About the role

R&D Metallurgist designs, executes, and analyzes experiments to advance 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.

Responsibilities

  • 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 throughout process streams
  • Collect experimental data including process parameters, weights, volumes, and analytical results
  • Analyze data using Excel and statistical tools to evaluate performance and identify optimization opportunities
  • Generate clear data visualizations, charts, and summary reports
  • Maintain detailed laboratory notebooks and digital documentation
  • Support DOE planning and multi-variable optimization studies
  • Perform routine maintenance, calibration, and troubleshooting of processing equipment
  • Follow all chemical handling, PPE, and MSHA/OSHA safety protocols
  • Maintain clean, organized, and safe laboratory environments
  • Conduct hazard assessments for chemical processes and experimental setups

Qualifications

  • 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)
  • Knowledge of purification techniques (precipitation, solvent extraction, ion exchange, crystallization)
  • Ability to read P&IDs and process flow diagrams
  • Experience with DOE software (JMP, Minitab, Design-Expert) is a plus
  • Exceptional attention to detail and data integrity
  • Strong analytical and problem-solving skills
  • Excellent communication and documentation abilities
  • Self-motivated with ability to manage multiple experiments
  • Unwavering commitment to safety and quality
  • Valid driver's license required

Skills

Required:Design of Experiments (DOE)Statistical analysisChemical processingReactor operationExcel/data visualization

Benefits

  • Not specified
Last updated Sep 16, 2026. Interested? Apply on the company site.

About Mariana Minerals

We to the Future of Minerals, verify the mineral supply chain.

Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.

software-firstmineralsenergyAIdefense
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