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Job description
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.
Key Responsibilities
Operate, calibrate and troubleshoot analytical instruments, particularly ion chromatography (IC), along with ICP-OES/MS and XRF
Perform precise sample preparation across various matrices, including weighing, digestion, dilution and filtration, with zero cross-contamination
Prepare standards and calibration solutions, and run routine analytical testing with accurate, reliable results
Record observations and raw data accurately in LIMS or lab notebooks, and review results for integrity
Flag instrument or data issues early and help work out the cause
Keep a clean, organized workspace and manage chemical inventory and waste disposal to regulatory standards
Follow all SOPs, chemical hygiene plans and PPE requirements to keep the lab safe
Required Qualifications
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
Schedule
Full-time, Monday–Friday, day shift, based at our San Francisco HQ
Working Environment & Physical Requirements
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
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!