Analytical Lab Chemist
About The Position
Mariana Minerals is a software-first, vertically integrated minerals company working to supply critical minerals for energy, AI, and defense technologies. It combines industry expertise with software, automation, and data-driven decision-making. The Analytical Lab Chemist will work in the company's analytical lab in San Francisco, performing sample preparation and analytical testing using advanced equipment. The role involves maintaining accurate data and instrument performance, investigating analytical problems such as unknown samples from the plant, and collaborating with lab technicians and an analytical team supporting multiple sites. The position offers room to grow into lab ownership or regional or global responsibilities as the company expands.
Requirements
- Bachelor’s degree in Chemistry, Chemical Engineering, or a related field.
- Lab experience through undergraduate research, internships, co-ops, or work.
- Solid wet chemistry skills, including acid digestion and preparing standards.
- Experience with at least one of ICP-OES/MS, XRF, AA, GC, HPLC, or UV-Vis, whether through research or coursework.
- Troubleshooting ability and interest in determining why an instrument or result is not right.
- Authorized to work in the US without sponsorship.
- Able to stand and work at a lab bench for extended periods and lift samples and supplies up to 25 lbs.
Nice To Haves
- Hands-on ion chromatography (IC) experience.
- Familiarity with EPA, ISO, or GLP/GMP standards.
- Mining, metals, or hydrometallurgy exposure.
Responsibilities
- Perform precise sample preparation across various matrices, including weighing, digestion, dilution, and filtration.
- Prepare standards and calibration solutions.
- Operate, calibrate, and troubleshoot analytical equipment, particularly ion chromatography (IC), ICP-OES, ICP-MS, and XRF.
- Record data accurately in LIMS or lab notebooks and review results for integrity.
- Help diagnose analytical problems, including unknown samples from the plant, and work with operations on next steps.
- Write and improve SOPs and lab workflows.
- Support lab technicians and share knowledge across the team.
- Follow SOPs, chemical hygiene plans, and PPE requirements; manage chemical inventory and waste to regulatory standards.
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What This Job Offers
Job Type
Full-time
