Lab Technician

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.

As a Lab Technician, you'll support safe, efficient and high-quality process development studies and analytical tests. You'll work closely with R&D and engineering to build, operate and maintain ore leaching columns, and deliver timely, accurate and actionable chemical analysis of ore, process streams and final products. You'll play a critical role in bridging leaching research and lab analytics with plant operations, helping make sure processes are robust, efficient and ready for future development and scale-up.

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  Drive ore handling, including crushing, sorting by particle size and taking representative samples

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  Prepare samples for analysis using techniques such as digestion, dilution and filtration

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  Perform elemental and compositional analysis of solid and liquid samples using ICP, NMR, XRF, titrators or similar analytical techniques

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  Document analytical results in laboratory information systems and maintain clear experimental records and material metrics using digital tools

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  Follow strict environmental, health and safety protocols

• Experience in minerals processing, metallurgy, chemicals, specialty materials or similar industrial environments

• Hands-on experience operating analytical or similar equipment

• Familiarity with chemical processing (pumps, columns, instrumentation) or crushing equipment (crushers, grinders, conveyors, sorters)

• Mechanical aptitude and ability to perform basic fabrication and troubleshooting

• Ability to read and follow SOPs, equipment manuals and safety guidelines

• Strong communication skills and willingness to collaborate across teams

• Commitment to safety, accuracy and operational excellence

• Hands-on production lab at a working mine, not a clean lab

• Regular exposure to dust, noise, acid fumes and mud

• Ability to lift up to 50 lbs and stand for extended periods