Analytical Lab Chemist

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.

Join our laboratory team as an Analytical Lab Chemist. This senior-level role focuses on high-quality sample preparation and routine analytical testing, with a particular emphasis on ion chromatography (IC). The ideal candidate is a disciplined scientist who prioritizes lab safety, enjoys hands-on analytical work, and has a solid understanding of IC, spectroscopic instrumentation and other chemical analysis equipment.

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  Operate, calibrate and troubleshoot analytical instruments, particularly ion chromatography (IC), along with ICP-OES/MS and XRF

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  Perform precise sample preparation across various matrices, including weighing, digestion, dilution and filtration, with zero cross-contamination

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  Prepare standards and calibration solutions, and run routine analytical testing with accurate, reliable results

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  Record observations and raw data accurately in LIMS or lab notebooks, and review results for integrity

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  Flag instrument or data issues early and help work out the cause

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  Keep a clean, organized workspace and manage chemical inventory and waste disposal to regulatory standards

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  Follow all SOPs, chemical hygiene plans and PPE requirements to keep the lab safe

• Associate or bachelor’s degree in Chemistry, Biochemistry or a closely related scientific field

• Hands-on ion chromatography (IC) experience strongly preferred

• Demonstrated proficiency in wet chemistry techniques (pipetting, titration, acid digestion)

• Familiarity with the principles of analytical instrumentation

• Hands-on experience or academic exposure to titration, Flame AA, ICP-OES/MS or XRF is a plus

• Knowledge of EPA, ISO or GLP/GMP standards

• Strong attention to detail, excellent time management, a collaborative approach and a willingness to learn new skills

• Laboratory setting with regular handling of acids, solvents, and other hazardous chemicals

• Required PPE includes lab coat, safety glasses, gloves, and closed-toe shoes

• Ability to stand at a lab bench for extended periods

• Ability to lift up to 25 lbs

• Fine motor skills for precise pipetting, weighing, and instrument handling

• Full-time, Monday–Friday, day shift, based at our San Francisco HQ