Staff Process Engineer | Houston, TX

Mineral Processing and Metallurgy
Texas, United States
May 20, 2026
$140,000 - $175,000 / year
Full-time
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Job Description

Company: Mariana Minerals
Location: Houston, Texas, United States (On-site)
Category: Mineral Processing and Metallurgy
Job Type: Full-time
Experience Level: Senior-Level
Salary: $140,000 – $175,000 USD / year

Job Summary
Mariana Minerals is seeking a Staff Process Engineer to support its next-generation minerals processing pilot plant in Houston.

This role supports the design, deployment, operation, troubleshooting, and optimization of first-of-its-kind refining processes for critical minerals, helping bridge R&D and plant operations from laboratory development through pilot demonstration and commercial production.

Key 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 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 automated plant monitoring and optimization tools in collaboration with software and machine learning teams
  • Support safe operations through EHS compliance, hazard assessments, risk management, and management of change processes
  • Work closely with technicians, engineers, and cross-functional teams to ensure processes are robust, safe, and ready for industrial deployment
  • Help scale refining technologies from laboratory development to pilot demonstration and commercial production

Qualifications

  • Bachelor’s, Master’s, or PhD in Chemical Engineering or a related field
  • 10+ years of experience in operations, process scale-up, or plant design
  • Experience in minerals processing, chemicals, specialty materials, oil and 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

Why This Role Matters
This role is critical to scaling innovative critical minerals refining processes from laboratory development to pilot plant demonstration and commercial production through safe, data-driven, and technically robust process engineering.

Apply
👉 Apply online: https://jobs.ashbyhq.com/marianaminerals/54b3a115-b569-48ed-a483-f97caf6e7757

⚠️ Disclaimer
This job is shared for informational purposes. WeMineUp is not affiliated with the hiring company. Please apply through the official company process.

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