About this role
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.
Join our analytical lab at Copper One as an Associate Analytical Chemist. You’ll run sample prep and analytical testing on state-of-the-art equipment in a newly renovated lab, keep data accurate and instruments performing at their best, and dig into problems that don’t come with a textbook answer, like an unknown sample straight from the plant. You’ll work closely with our lab technicians and learn alongside an analytical team that supports labs across multiple sites, with room to grow into owning the lab or a regional or global role as we expand. Recent graduates in Chemistry or Chemical Engineering are encouraged to apply.
Key Responsibilities
- Perform precise sample preparation across various matrices, including weighing, digestion, dilution and filtration
- Prepare standards and calibration solutions
- Operate, calibrate and troubleshoot analytical equipment, including ICP-OES, ICP-MS and XRF
- Record data accurately in LIMS or lab notebooks and review results for integrity
- Help diagnose analytical problems, including unknown samples from the plant, and work with operations on next steps
- Write and improve SOPs and lab workflows
- Support lab technicians and share knowledge across the team
- Follow all SOPs, chemical hygiene plans and PPE requirements; manage chemical inventory and waste to regulatory standards
Qualifications & Experience
- Bachelor’s degree in Chemistry, Chemical Engineering or a related field (2024–2026 graduates welcome)
- Hands-on lab experience through undergraduate research, internships, co-ops or work
- Solid wet chemistry skills, including acid digestion and preparing standards
- Experience with ICP-OES/MS, XRF, AA, GC, HPLC or UV-Vis, whether in research or coursework
- A troubleshooter who likes figuring out why an instrument or result isn’t right
- Familiarity with EPA, ISO or GLP/GMP standards a plus
- Mining, metals or hydrometallurgy exposure a plus
- Authorized to work in the US without sponsorship
Working Environment & Physical Requirements
- Regular work with chemicals, acids and acid digestions; standard lab PPE required (safety glasses, lab coat, gloves)
- Able to stand and work at a lab bench for extended periods and lift samples and supplies up to 25 lbs
- 25–35% travel (about one week a month) to our other lab sites, including occasional weekend travel
- Full-time, salaried
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!