Why this role exists
Mariana Minerals raised $310M Series B on 5 Aug 2026. This role went up 51 days later.
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 Process & Lab Technician to support the safe, efficient, and high-quality process development studies and analytical tests. In this role, you will work closely with R&D and engineering to build, operate, and maintain ore leaching columns. You will also be responsible for timely, accurate, and actionable chemical analysis of ore, process streams, and final products. You will play a critical role in bridging leaching research and laboratory analytics with plant operations, helping ensure processes are robust, efficient, and suitable for future development & scale-up. What You’ll Do - Drive ore handling including crushing, sorting by particle size, and taking representative samples - Prepare samples for analysis using techniques such as digestion, dilution, and/or filtration - Perform elemental and compositional analysis of solid and liquid samples using ICP, NMR, XRF, Titrator, or similar analytical techniques - Document analytical results in laboratory information systems and maintain clear experimental records and material metrics using digital tools and software - Follow strict environmental, health, and safety protocols Desired Qualifications - Experience working in minerals processing, metallurgy, chemicals, specialty materials, or similar industrial environments - Familiarity with chemical processing (pumps, columns, instrumentation, etc) or crushing equipment (crushers, grinders, conveyors, sorters, etc) - Ability to read and follow SOPs, equipment manuals, and safety guidelines - Mechanical aptitude and ability to perform basic mechanical fabrication and troubleshooting - Hands-on experience operating analytical or similar equipment - Strong communication skills and willingness to collaborate across teams - Commitment to safety, accuracy, and operational excellence - Ability to lift up to 50 lbs and work on your feet for extended periods OUR CULTURE IS BUILT ON FOUR PRINCIPLES: Everyone Gets Home Safe. We never put speed or cost ahead of people. 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!