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 Fabrication Technician to join our San Francisco Pilot Plant team. You will support the design, installation, and maintenance of first-of-its-kind refining processes for critical minerals. As part of a growing maintenance team, you’ll help build out our fabrication capabilities, getting creative with the resources we have and adapting to the unique demands of R&D builds. This position plays a critical role in bridging R&D and Operations, ensuring our equipment and work processes are robust, safe, cost-effective, and suitable for commercial production.

What You'll Do

• Drive the fabrication, installation, modification, startup, and commissioning of new equipment and pilot plant systems in San Francisco and other sites across the US