{"id":"4392787330","title":"Lab Technician","posted_at":"2026-03-26T00:00:00.000Z","apply_url":"https://jobs.ashbyhq.com/marianaminerals/26e91a73-8ba8-4aaf-a4ca-ecec901e792a?utm_source=jobs.a16z.com","locations":["San Francisco, CA"],"employment_type":"full_time","workplace_type":null,"seniority_level":"entry","description_language":"en","source_name":"consider","source_url":"https://jobs.ashbyhq.com/marianaminerals/26e91a73-8ba8-4aaf-a4ca-ecec901e792a","salary":{"min":30,"max":40,"currency":"USD","period":"hour","display":"$30–$40/hour"},"job_summary":"Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying critical minerals for energy, AI, and defense. The Lab Technician will support refining processes by providing high-quality analytical data and ensuring accurate chemical analysis of process streams.","job_description":{"responsibilities":["Prepare samples using digestion, dilution, and filtration techniques","Perform elemental and compositional analysis using ICP, NMR, XRF, and titrators","Maintain and calibrate analytical instrumentation","Develop and refine SOPs for sample preparation and analytical workflows","Support method development and validation for new materials","Document analytical results in laboratory information systems","Ensure safe handling and disposal of chemicals and waste","Maintain laboratory organization and inventory"],"minimum_qualifications":["Associate or Bachelor’s degree in Chemistry, Biology, Materials Science, or a related technical field","Hands-on experience operating ICP, XRF, or similar analytical instrumentation","Understanding of inorganic chemistry, trace element analysis, and matrix effects","Experience in minerals processing, metallurgy, chemicals, or industrial environments","Familiarity with QA/QC protocols and data validation","Ability to troubleshoot instrumentation and perform routine maintenance","Ability to stand for extended periods"],"preferred_qualifications":["Experience supporting pilot plant or production operations"]},"visa_sponsorship":null,"experience_years_min":null,"job_address":null,"job_city":"San Francisco","job_state":"CA","job_country":"US","location_lat":37.7841915,"location_lng":-122.39589810000001,"keywords":["attention to detail","collaboration","Supply Chain","high-quality","Collaborate","data-driven","performance","operations","production","automation","processing","priorities","compliance","commercial","analytics","efficient","inclusive","inventory","standards","workflows","accuracy","develop","teams","data","AI"],"company":{"name":"Mariana Minerals","logo_url":"https://img.logo.dev/marianaminerals.com?token=pk_fWx5G5QrQMm-0Ud8BW3mBg&size=64&format=png","description":"Mariana Minerals is a software-integrated minerals company that develops and operates pyrometallurgical refining and thermal processing systems to supply critical minerals for energy, AI, and defense technologies.","website_url":"https://marianaminerals.com","linkedin_url":"https://www.linkedin.com/company/mariana-minerals","glassdoor_url":"https://www.glassdoor.com/Overview/Working-at-Mariana-Minerals-EI_IE10762178.11,27.htm","x_url":null,"instagram_url":null,"youtube_url":null,"github_url":null,"huggingface_url":null,"tiktok_url":null,"crunchbase_url":"https://www.crunchbase.com/organization/mariana-minerals","facebook_url":null,"employee_count_range":"51-200","employee_count":null,"founded_year":2024,"headquarters":{"address":null,"city":"San Francisco, CA","country":"US","lat":37.7879363,"lng":-122.4075201},"industry":"other","company_type":"startup","total_funding_usd":85000000,"locations":["Ann Arbor, MI","Austin, TX","Houston, TX","Moab, UT","San Francisco, CA","Texas, USA","Utah, USA","Washington, DC"]}}