Mariana Minerals
R&D Technician
San Francisco HQ · On-site · Full-time · Posted Oct 29, 2026
- Experience
- 2–5 years' experience in chemical processing, hydrometallurgy, or laboratory/pilot plant operations.
- Education
- Bachelor's degree in Chemistry, Chemical Engineering, Metallurgy, or related technical field preferred.
About the job
Executes experiments and operates chemical processing equipment to optimize critical-mineral extraction and purification processes.
What you'll do
- Run DOE protocols, prepare reagents, and operate bench- and pilot-scale processing equipment.
- Monitor process parameters, collect and analyze experimental data, and create visualizations and reports.
- Maintain equipment and documentation, conduct hazard assessments, and follow chemical and workplace safety protocols.
What they ask for
- 2–5 years' experience in chemical processing, hydrometallurgy, or laboratory/pilot plant operations.
- Hands-on experience with chemical reactors, filtration, and separation equipment.
- Advanced Excel proficiency; understanding of chemical process fundamentals and purification techniques.
- Valid driver's license.
Nice to have
- Bachelor's degree in Chemistry, Chemical Engineering, Metallurgy, or related technical field (preferred).
- DOE methodology and statistical analysis; DOE software such as JMP, Minitab, or Design-Expert is a plus.
Pay
$40 – $47 per hour (base salary)
Tools
Excel, JMP, Minitab, Design-Expert, P&IDs, MSHA/OSHA
Model-written summary · the original posting is authoritative