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.

The R&D Intern will be responsible for pursuing an independent project guided by a Brimstone scientist in addition to assisting scientists with sample preparation and analysis and getting experience across a variety of R&D projects. The successful candidate will be an effective team-player who is enthusiastic about contributing to Brimstone’s mission to decarbonize cement. Each intern will report and be mentored by a scientist on the R&D team.

This role is based in Oakland, California at Brimstone HQ, this is 40 hour per week for 10-12weeks onsite role over the course of the 2025 summer internship period.

Key Focus Areas of the role may include:

• Execute an experimental matrix of lab experiments under the guidance of a Brimstone scientist.

• Provide an end of internship report on the experimental project.

• Provide intermediate updates on project progression.

• Support routine analytical measurements and data processing for R&D scientists at Brimstone.

• Perform routine sample preparation tasks, following standard operating procedures for specific sample types.

• Strong attention to detail.

• Demonstrating flexibility and a collaborative mindset by supporting team members with tasks and projects that may extend beyond primary job responsibilities, ensuring overall team success.

For this role, we’re looking for:

• Working towards a BA/BS in Chemistry, Chemical Engineering, Metallurgy, Materials or is related STEM field, and you are comfortable working in a scientific lab environment.

• Wet chemistry lab experience in an academic or industrial environment.

• You are able to effectively manage your time to complete all day-to-day tasks, given a list of assignments and relative priorities.

• You are curious, like problem solving, have a high attention to detail, and communicate your needs and blockers proactively.

• Proficiency with written and digital data entry and record keeping using e.g. Microsoft Office Suite (Excel), Asana or other standard software.

• Ability to lift 40 pounds

Additional skills that are preferred but not required:

• Knowledge/familiarity of elemental analysis techniques (ICP-OES, XRF, XRD)

• Knowledge/familiarity of metallurgical experimental techniques and analysis

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.

Our Commitment to Diversity

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.