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Staff Process Engineer

Mariana Minerals· Process Development
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Houston, TX$140k - $175kFull-timePosted 7mo ago

About the role

Process Engineer role supporting a next-generation minerals processing pilot plant in Houston, bridging R&D and commercial production by designing, deploying, and operating refining processes for critical minerals in a hands-on environment.

Responsibilities

  • Lead equipment and process design from concept through procurement, fabrication, installation, commissioning, and startup
  • Operate, troubleshoot, and improve pilot-scale processing equipment in collaboration with pilot plant technicians
  • Design and execute pilot-scale experiments to evaluate process performance, recovery, throughput, and product quality
  • Develop and maintain key process documentation including PFDs, P&IDs, mass and heat balances, operating procedures, and control narratives
  • Analyze experimental and operational data to identify opportunities for process optimization and scale-up
  • Support development of automated plant monitoring and optimization tools in collaboration with software and machine learning teams
  • Ensure safe operations by supporting EHS, hazard assessments, risk management, and management of change processes

Qualifications

  • B.S., M.S., or PhD in Chemical Engineering or a related field
  • 10+ years of experience in operations, process scale-up, or plant design in minerals processing, chemicals, specialty materials, oil & gas, or related industries
  • Demonstrated experience driving equipment design, commissioning, and plant operation
  • Strong understanding of unit operations and equipment such as kilns, furnaces, ion exchange, solvent extraction, solid-liquid separation, leaching, electrowinning, or similar technologies
  • Ability to design experiments, troubleshoot complex processes, and analyze operational datasets
  • Strong commitment to Health, Safety, and Environmental compliance
  • Excellent technical writing, communication, and teamwork skills
  • Comfortable working in fast-paced environments, wearing multiple hats, and managing ambiguity

Skills

Required:Chemical engineering fundamentalsProcess design and scale-upPilot plant operationsAnalytical data interpretationDocumentation and technical writing
Last updated Sep 9, 2026. Interested? Apply on the company site.

About Mariana Minerals

We to the Future of Minerals, verify the mineral supply chain.

Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.

software-firstmineralsenergyAIdefense
Company profileWebsite

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