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About the Role

Lead 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.

Responsibilities

• Operate, maintain, troubleshoot, and improve pilot-scale processing equipment with Pilot Plant Technicians.
• Design experiments to evaluate process performance, recovery, throughput, and product quality.
• Create and maintain engineering and operational documentation such as PFDs, HMBs, P&IDs, Operating Procedures, and Process Control Narratives.
• Lead equipment design scopes from concept through procurement, fabrication, installation, commissioning, and handover to Operations.
• Collaborate with cross-functional teams including R&D, commercial plant design engineers, and project execution teams to scale designs.
• Develop and implement reactor and plant optimization algorithms with software and machine learning teams.
• Travel to pilot and commercial sites to drive commissioning, startup, and ramp-up.

Requirements

• Minimum of 5 years of experience supporting R&D scale up, pilot plant operation, and/or commercial production in minerals processing, chemicals, specialty materials, oil & gas, or similar industry.
• Hands-on experience designing, commissioning, and operating pilot or commercial-scale process equipment.
• Ability to design experiments, problem-solve, and analyze complex datasets.
• Strong commitment to Health & Safety and experience with risk management, management of change, and hazard assessment.
• Excellent technical writing, communication, and teamwork skills.
• Comfort working in fast-paced, cross-functional environments.

Skills

• Reaction engineering
• Solid-liquid separation
• Leaching
• Ion exchange
• Solvent extraction
• Process design
• Process deployment
• Process operation
• Software development support
• Automated plant optimization
• Experiment design
• Data analysis
• Technical writing
• Communication
• Teamwork

Location

• San Francisco

Work Type

• Full-time

Experience Level

• Minimum of 5 years of experience

Education Level

• B.S., M.S., or PhD in Chemical Engineering or related field

About the Company

• Mariana Minerals is a software-first, vertically integrated minerals company.
• The company's mission is to supply the critical minerals powering modern energy, AI, and defense technologies.
• They are reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.
• Culture is built on principles of Extreme Ownership, Engineer Out Requirements then Automate, and Share Your Legos.
• The company is building the future of responsible mineral sourcing and supply.