Concrete Engineer

Oakland, CA /
R&D /
Full Time - On Site
About Us
The cement/concrete industry is a $1T market opportunity responsible for 5.5% of GHG or approximately 7.5% of global CO2 emissions. This is the same amount of emissions released by the cars we drive daily. Increased concentrations of greenhouse gasses in our atmosphere not only pose a threat to all living things on earth, but especially to disadvantaged communities. At Brimstone, we’ve taken the initiative to stop and revert the effects of climate change through the production of carbon-neutral Portland cement and supplementary cementitious materials, regardless of the energy source. 

Our mission is to eliminate industrial greenhouse gas emissions by developing technologies to help industries transition faster to net-zero. 

Brimstone was founded in 2019 at Caltech and since then moved to the Bay Area thanks to Cyclotron Road and other federal and private grants. We are lucky to be supported by wonderful investors and advisors. Over the past couple of years, we have worked to build an equitable company that we are proud of with very special individuals dedicated to this cause which gives us an immense amount of joy to work with every day. Our culture is focused on hard work, equity, and gratitude.

You Should Join Us If You:
Are passionate and motivated about our mission and fighting climate change
Have a great sense of curiosity and a drive to solve problems
Are a team player and thrive in a fast-paced startup environment 
Have excellent written and verbal communication skills

Position Overview
This is the perfect opportunity for an individual who is passionate about solving hard problems, wants to have a significant impact, and who has free flowing anxiety about climate change. We are looking for someone who is very comfortable designing cement and concrete mixes, performing ASTM tests, and working with supplementary cementitious materials. Other qualities include creativity, thinking small and big around the process, and keeping a good record of data. We. are looking for an individual with over 5 years of experience which includes experience in concrete/cement R&D labs as well as industry.  This person will be joining a powerful and diverse team of talented engineers, metallurgists, geologists, and scientists from all around the world. We promote a dynamic team effort where each voice is heard.


    • Lead the construction of R&D concrete lab inside our facility
    • Develop mixes for different products
    • Perform ASTM tests in-house and pass certifications
    • Provide guidance on product specs to the team
    • Be proactive
    • Answering by “Yes if” instead of “No because”


    • Track record of work with designing and preparing cement mixes
    • Demonstrated experience with ASTM standards
    • Familiarity with hydrometallurgy, pyrometallurgy, and chemistry
    • Attention to details and high sensitivity to timeline
    • Strong demonstration or willingness to follow safety rules in a laboratory setting
    • Is comfortable with tools like Google Drive, Slack, and Notion
Salary and Benefits
A highly competitive salary
Equity in the company
Medical, Dental, and Vision insurance is 100% covered for employees and dependents
Therapy and Counseling costs are 100% covered 
A computer of your choice
Up to $10,000 of moving expenses
30 days of paid vacation + all federal holidays (9 days) + all days between Christmas and New Year
Commuter benefits and public transportation expenses are 100% covered
A fun, diverse, and talented team focus on making the biggest impact possible on climate change

Our Commitment to Diversity
Brimstone is an equal opportunity employer committed to diversity and inclusion in the workplace. We are seeking to build a unique team of individuals and create an environment where all backgrounds and experiences are valued. We credit our success to the different perspectives each team member presents and would never discriminate on the basis of race, color, ancestry, religion, national origin, sex, gender identity, sexual orientation, age, marital status, disability status, or Veteran status.