R&D Metallurgical Engineer

Founded in 2019, Brimstone is an innovative industrial startup with a proprietary, efficient, and deeply decarbonized process for producing Ordinary Portland Cement. We’re now growing our all-star team of sharp, mission-driven, collaborative professionals as we continue to refine our process and move towards construction of our first production facilities.

We are seeking a hands‑on Extractive Metallurgist to join our R&D organization in a lab‑intensive, experimental role. This position is ideal for someone who thrives in the lab, enjoys getting their hands dirty, and wants to work closely with junior engineers and technicians to advance extractive metallurgy processes at bench and pilot scale.

This is not a process design or desk‑based role. The first 6–12 months will be heavily focused on experimental lab work.

• Design and execute bench‑scale and laboratory experiments in extractive metallurgy
• Perform hands‑on experimental work involving:
  • Hydrometallurgical processes (leaching, precipitation, solvent extraction, etc.)
  • Pyrometallurgical processes (thermal treatment, roasting, smelting concepts, etc.)
• Work closely with junior engineers and technicians, providing technical guidance and day‑to‑day mentorship
• Develop, document, and analyze experimental results; iterate rapidly based on findings
• Support early‑stage R&D programs rather than downstream process optimization
• Maintain lab equipment, ensure safe lab practices, and contribute to experimental setup and teardown
• Collaborate with cross‑functional teams to translate experimental insights into development pathways

• PhD in Metallurgical Engineering, Materials Science, or a closely related field
• Strong academic and/or professional focus in Extractive Metallurgy
• Demonstrated R&D laboratory experience with significant hands‑on experimental work
• Deep technical background in Hydrometallurgy and/or Pyrometallurgy
• Comfortable working in a highly experimental, lab‑driven environment

In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification form upon hire.

Brimstone is an equal opportunity employer committed to diversity, equity, inclusion, and belonging in the workplace. We seek to build a unique team of individuals and create an environment where all backgrounds and experiences are respected and appreciated. We credit our success to the values that we uphold, and to the different perspectives each team member brings every day. We would never intentionally discriminate on the basis of race, color, ancestry, religion, national origin, sex, gender identity or expression, sexual orientation, age, marital status, disability status, pregnancy, veteran status, or any other status protected by federal or state law.

We strive to provide an inclusive candidate experience. If there are any reasonable accommodations that you may need during the interview process, please let us know.