R&D Technician

Mariana Minerals•San Francisco, CA

14h

About The Position

The R&D Technician executes designed experiments and operates chemical processing equipment to advance Mariana Minerals' hydrometallurgical and purification technologies. This hands-on role focuses on running DOE protocols, operating tank reactors and purification systems, and analyzing data to optimize extraction and separation processes for critical minerals.

Requirements

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 (pivot tables, statistical functions, data visualization)
Understanding of chemical process fundamentals (mass balance, stoichiometry, reaction kinetics)
Knowledge of purification techniques (precipitation, solvent extraction, ion exchange, crystallization)
Ability to read P&IDs and process flow diagrams
Exceptional attention to detail and data integrity
Strong analytical and problem-solving skills
Excellent communication and documentation abilities
Self-motivated with ability to manage multiple experiments
Unwavering commitment to safety and quality
Valid driver's license required

Nice To Haves

Bachelor's degree in Chemistry, Chemical Engineering, Metallurgy, or related technical field preferred
Experience with Design of Experiments (DOE) methodology and statistical analysis highly desirable
Experience with DOE software (JMP, Minitab, Design-Expert) is a plus

Responsibilities

Execute Design of Experiments (DOE) protocols for chemical processing, extraction, and purification
Operate tank reactors, filtration systems, separation equipment, and purification units at bench and pilot scale
Prepare chemical solutions and reagents according to experimental specifications
Monitor and control process parameters: temperature, pH, flow rates, residence time, and reagent dosing
Perform systematic sampling and material handling throughout process streams
Collect experimental data including process parameters, weights, volumes, and analytical results
Analyze data using Excel and statistical tools to evaluate performance and identify optimization opportunities
Generate clear data visualizations, charts, and summary reports
Maintain detailed laboratory notebooks and digital documentation
Support DOE planning and multi-variable optimization studies
Perform routine maintenance, calibration, and troubleshooting of processing equipment
Follow all chemical handling, PPE, and MSHA/OSHA safety protocols
Maintain clean, organized, and safe laboratory environments
Conduct hazard assessments for chemical processes and experimental setups