--- title: Laboratory Technician at Mariana Minerals description: Mariana Minerals is hiring for the Laboratory Technician role in San Francisco, CA. Pays $40–$45 per hour. See the full description and apply. type: job url: https://www.foundrole.com/jobs/laboratory-technician-at-mariana-minerals-01a118c2-596d-7416-9cb0-26236a477c65 date: 2026-10-08T00:15:45Z og_description: Join Mariana Minerals as Laboratory Technician in San Francisco, CA. Pays $40–$45 per hour. Full-time, on-site role. og_image: https://www.foundrole.com/og/2u5jno.png breadcrumbs: - label: Home url: https://www.foundrole.com/ - label: Search url: https://www.foundrole.com/jobs --- | | | |---|---| | **Company** | Mariana Minerals | | **Location** | San Francisco, CA | | **Salary** | $40/hr - $45/hr | | **Type** | Full Time | | **Posted** | Oct 07, 2026 | ## Description # **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** The Laboratory Technician runs high-temperature processing equipment in Mariana Minerals' Deep Sea Nodule Lab, where we turn polymetallic nodules from the Clarion-Clipperton Zone (CCZ) into battery-grade nickel, copper and cobalt. This hands-on role prepares feed, operates a rotary kiln, electric arc furnace and induction converter, samples products, and keeps the lab safe and orderly. The role reports to the Process/Metallurgical Engineering lead and works under engineer supervision at first, with a path to independent operation. **What You'll Do** - Crush, screen, dry, split and weigh nodule and calcine samples; run nodule wash trials - Operate the rotary kiln and its off-gas train: condenser, gas analyzers and NaOH impingers - Prepare charges, monitor and tap electric arc furnace heats; run box furnace screening melts - Run induction converter heats, including crucible pre-heat, pyrite charging, oxygen blows and timed sampling - Monitor temperatures, arc power, gas flows and cooling water; respond to alarms and interlocks - Verify exhaust fans and scrubbers before hot work; change gas cylinders and maintain scrubber liquor - Record run data in batch sheets and spreadsheets: charge weights, temperatures, gas flows, product masses and sample IDs - Track samples through shipment to external labs with chain-of-custody records - Keep inventory of crucibles, refractories, reagents and gases - Perform routine maintenance and minor repairs; support commissioning of new equipment - Follow SOPs, lockout/tagout, hot-work and gas-handling procedures, and wear PPE for molten-metal work - Inspect safety equipment on schedule and report near-misses and equipment issues promptly **Desired Qualifications** - Associate degree or technical diploma in chemistry, materials, metallurgy or a related field, or equivalent hands-on experience - 2+ years' experience in a lab, foundry, smelter, refinery or similar high-temperature setting - Comfort operating furnaces, gas cylinders and pressurized or water-cooled equipment - Experience with molten metal handling, tapping or crucible melting is a plus - Familiarity with induction, arc or tube furnaces, off-gas sampling or wet scrubbers is a plus - Sample preparation for XRF or ICP analysis is a plus - Careful record-keeping and working knowledge of Excel - Strong safety habits and willingness to stop work when conditions are unsafe - Able to lift up to 50 lb (23 kg), stand for long periods, and work near radiant heat, molten material and process gases - Medically cleared and fit-tested for respirator use - On-site role with standard weekday hours and occasional extended shifts to finish a furnace heat or cool-down ## **Our culture is built on four principles:** **Everyone Gets Home Safe.** We never put speed or cost ahead of people. **Extreme Ownership.** We take full responsibility for outcomes, relentlessly driving toward solutions. **Engineer Out Requirements, then Automate.** We simplify, optimize, and then automate for scale. **Share Your Legos.** We collaborate openly, share knowledge, and empower each other to build bigger, better solutions. **Join us as we build the future of responsible mineral sourcing and supply!** ## Skills - Oil Refinery Operations - Alarm Systems - Minor Repairs - Intrusion Detection And Prevention - Sample Preparation - Spreadsheets - Microsoft Excel - Chain of Custody - Commissioning - Metallurgy - Metalworking - Atlassian Crucible - Standard Operating Procedures (Sop) - Maintenance - X-Ray Fluorescence (Xrf) - Respiratory Protection - Interlocking - Personal Protective Equipment - Hot Work Safety ## Related - [Science & Research jobs](https://www.foundrole.com/careers/science-and-research?utm_source=ai_markdown)- [Scientific Technician jobs](https://www.foundrole.com/careers/science-and-research/scientific-technicians?utm_source=ai_markdown)- [Laboratory Technician jobs](https://www.foundrole.com/careers/science-and-research/scientific-technicians/laboratory-technician?utm_source=ai_markdown)- [Browse all companies](https://www.foundrole.com/companies?utm_source=ai_markdown) ## Explore this job market - [California](https://www.foundrole.com/locations/us/california?utm_source=ai_markdown) — 273556 jobs - [San Francisco, CA](https://www.foundrole.com/locations/us/california/san-francisco?utm_source=ai_markdown) — 27052 jobs - [Mining](https://www.foundrole.com/sectors/energy-and-utilities/mining?utm_source=ai_markdown) — 6868 jobs ## Related pages - [California](https://www.foundrole.com/locations/us/california?utm_source=ai_markdown) — 273556 jobs - [San Francisco, CA](https://www.foundrole.com/locations/us/california/san-francisco?utm_source=ai_markdown) — 27052 jobs - [Mining](https://www.foundrole.com/sectors/energy-and-utilities/mining?utm_source=ai_markdown) — 6868 jobs ## Browse - [Companies](https://www.foundrole.com/companies?utm_source=ai_markdown) - [Jobs by country](https://www.foundrole.com/locations?utm_source=ai_markdown) - [Jobs in the United States by state and city](https://www.foundrole.com/locations/us?utm_source=ai_markdown) - [H1B sponsors by location](https://www.foundrole.com/h1b-sponsors?utm_source=ai_markdown) - [H1B salaries](https://www.foundrole.com/h1b-salaries?utm_source=ai_markdown) - [Sectors and industries](https://www.foundrole.com/sectors?utm_source=ai_markdown) - [Jobs by career field](https://www.foundrole.com/careers?utm_source=ai_markdown) - [Latest jobs](https://www.foundrole.com/jobs/latest?utm_source=ai_markdown)