Analytical Lab Chemist

marianaminerals.com; San Francisco (CA); On-site; USD 70,000 - 100,000; Full time

Job summary

Mariana Minerals in San Francisco seeks a detail-oriented Analytical Lab Chemist to support high-quality sample preparation and routine analytical testing. This senior role emphasizes safety, precision, and hands-on work with analytical instrumentation.

The ideal candidate has a chemistry degree, experience with wet chemistry, and familiarity with instruments like ICP-OES/MS or XRF to ensure compliant data management and laboratory standards.

Qualifications

• Associate or Bachelor’s degree in Chemistry, Biochemistry, or related field.
• Proficiency in wet chemistry techniques (pipetting, titration, acid digestion).
• Familiarity with analytical instrumentation principles.
• Hands-on exposure to titration, flame AA, ICP-OES/MS, or XRF is desirable.
• Knowledge of EPA, ISO, GLP/GMP standards.
• Strong attention to detail, time management, teamwork, and willingness to learn.

Responsibilities

• Adhere to SOPs, chemical hygiene plans, and PPE for safety.
• Maintain lab organization, inventory, and proper waste disposal.
• Prepare samples with precise weighing, digestion, dilution, and filtration to avoid cross-contamination.
• Assist in operation, calibration, and basic troubleshooting of analytical equipment.
• Accurately record observations and data in LIMS or lab notebooks.

Skills

Wet chemistry

Analytical instrumentation

Attention to detail

Time management

Teamwork

Education

Associate or Bachelor’s degree in Chemistry

Tools

ICP-OES/MS

XRF

Job 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.

We are seeking a detail-oriented Analytical Lab Chemist to join our laboratory team. This senior-level role focuses on high-quality sample preparation and the execution of routine analytical testing. The ideal candidate is a disciplined scientist who prioritizes laboratory safety, is interested in hands-on analytical jobs, and possesses a foundational understanding of spectroscopic instrumentation and other chemical analysis equipment.

KEY RESPONSIBILITIES:

• Safety & Compliance: Strictly adhere to all SOPs, chemical hygiene plans, and PPE requirements to maintain a safe working environment.
• Lab Maintenance: willing to maintain a clean and organized workspace; manage chemical inventory and waste disposal according to regulatory standards.
• Sample Preparation: Perform precise preparation of various sample matrices, including weighing, digestion, dilution, and filtration, ensuring zero cross-contamination.
• Instrument Operation: Assist in the operation, calibration, and basic troubleshooting of analytical equipment.
• Data Management: Accurately record experimental observations and raw data into Laboratory Information Management Systems (LIMS) or lab notebooks.

REQUIRED QUALIFICATIONS:

• An associate/Bachelor’s degree in Chemistry, Biochemistry, or a closely related scientific field.
• 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 desirable.
• Knowledge of EPA, ISO, or GLP/GMP standards.
• Soft Skills: Strong attention to detail, excellent time management, and a commitment to collaborative teamwork, and willing to learn new skills.

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!