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Fabrication Technician

Mariana Minerals· Process Development
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San Francisco HQ$45/hr - $55/hrFull-timePosted 5d ago

About the role

Fabrication Technician to support design, installation, and maintenance of pilot plant refining processes for critical minerals, bridging R&D and operations in a San Francisco-based Pilot Plant.

Responsibilities

  • Drive the fabrication, installation, modification, startup, and commissioning of new equipment and pilot plant systems in San Francisco and other sites across the US
  • Troubleshoot and repair mechanical issues on plant equipment including pumps, valves, piping systems, filtration units, and other process equipment
  • Read and interpret engineering drawings, P&IDs, and equipment manuals to support maintenance and installation work
  • Safely perform maintenance activities following plant safety procedures including Lockout/Tagout (LOTO), hot work permitting, and confined space entry
  • Utilize MarianaOS CMMS system to document equipment builds and troubleshooting

Qualifications

  • Associate degree, technical certificate, or equivalent hands-on experience in industrial fabrication, mechanical technology, millwright work, or related field
  • 3+ years of experience building or supporting industrial equipment in minerals processing, chemicals, specialty materials, oil & gas, biotech, or similar industries
  • Hands-on experience fabricating, modifying, and/or constructing industrial equipment
  • Hands-on experience with troubleshooting tasks such as pump repair, valve replacement, and instrument troubleshooting
  • Familiarity with core plant safety practices including Lockout/Tagout (LOTO), hot work permits, confined space entry, and safe work permitting systems
  • Ability to read and interpret engineering drawings such as P&IDs, equipment diagrams, and mechanical layouts
  • Ability to travel occasionally (10-25%) to other Mariana sites to support fabrication activities
  • Ability to climb stairs, stand for extended periods of time, and safely lift up to 50 lbs.

Skills

Required:FabricationMechanical troubleshootingReading engineering drawings

Benefits

  • Final compensation is based on skills and experience $45 – $55 per hour
  • Offers Equity
Last updated Oct 21, 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
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