Pilot Plant Supervisor

Job description

# **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** Mariana Minerals is looking for a highly motivated Operations Supervisor to join our San Francisco Pilot Plant team. You will oversee a team of high performing technicians who support the design, deployment, and operation of first-of-its-kind refining processes for critical minerals, while also supporting development of software for automated plant optimization. This position is highly hands-on and will play a critical role in bridging R&D and Operations, ensuring processes are robust, safe, cost-effective, and suitable for commercial production. # **What You'll Do** - Serve as the direct lead for a team of high performing operations technicians - Help drive performance reviews, scheduling, training, and hiring - Collaborate with engineers, R&D scientists, and the technicians to operate and monitor mineral extraction chemical processes - Provide off-hours support on evenings and weekends to plant upsets and high priority projects - Create and sustain EHS programs and policies regarding chemical handling, hazard assessment, high risk activities, PPE and waste management compliance - Ensure high-quality data capture from the plant via sampling, basic laboratory measurements, instrument uptime, and MarianaOS usage - Own plant cleanliness and organization, ensuring work areas, tools, and equipment are well-maintained and ready for operations - Create and maintain procedures, experimental records, shift reports, and other critical operations documents # **Desired Qualifications** - 2+ years of experience in a supervisory or lead role - 5+ years of experience operating pilot plant or commercial scale industrial equipment in the minerals processing, chemicals, specialty materials, oil & gas, biotech, or similar industry - Demonstrated leadership in core plant safety work processes such as Lockout/Tagout (LOTO), hot work permitting, confined space entry, and safe work permitting systems - Experience using human–machine interfaces (HMIs) and plant software systems to monitor, control, and adjust process operation - Experience overseeing hands-on equipment installation, modification, and troubleshooting - Knowledge of basic process chemistry (pH, reaction stoichiometry, etc) - Experience using engineering documents such as PFDs, control narratives, and P&IDs - Excellent written and verbal communication skills - Climb stairs, stand for extended periods of time, and safely lift up to 50 lbs ## **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!**