Lab Technician

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.

As a Process & 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 you'll 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.

This is a hands-on production lab at a working mine, not a clean lab. Expect dust, noise, acid fumes and mud.

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!