Senior Analytical Lab Chemist: Precise Prep & Instrumentation

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

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.