Brimstone was founded in 2019 to stop and reverse the effects of climate change through the production of carbon-neutral Portland cement and supplementary cementitious materials, regardless of the energy source. The cement/concrete industry is a $1T market 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 gases in our atmosphere not only pose a threat to all living things on earth but have a disproportionate impact on disadvantaged communities. 

Through the revolutionary work from our world-class team of scientists and engineers, we are inventing a new process to make ordinary Portland cement and supplementary cementitious materials that is carbon-negative and will be at cost-parity (preferably lower-cost). Our team has made remarkable progress over the last few years and we are looking to scale up!

We’re building an all-star team of sharp, mission-driven, collaborative individuals who take pride in using their diverse skills to contribute to a better world. If you are interested in joining a team of builders, surfers, amateur chefs, podcast-junkies, bibliophiles, dog lovers, and car-campers who wake up every day excited to work on addressing climate change - we are the company for you!

Want to join us in decarbonizing cement? You can help us solve the most urgent, important challenge facing the world today (and have a blast while doing it).

Oakland, CA
11-50 employees
Founded 2019


We're on a mission to decarbonize the cement industry. Increased concentrations of greenhouse gases in our atmosphere pose a risk to the livelihoods of all living things on earth.

We became increasingly concerned about global warming through our work on water treatment and water scarcity in low-income countries while scientists at Caltech. Together, we decided to devote our careers to work on, invent, and scale processes that could mitigate and revert the effects of climate change. Through our work, we have found that working on cement is the biggest lever that we as founders have capacity and temperament to work on to make a more equitable world.

Our mission is to eliminate industrial greenhouse gas emissions by developing technologies to help industries transition faster to carbon-neutrality and this starts with cement.

In order to decarbonize the cement industry on a timescale that will avoid the worst aspects of climate change we believe three things are necessary:

  • We need to make the exact same material and that is Portland cement

  • The process must produce the cement material at a lower-cost or at least cost-parity compared to the conventional process

  • Even when a fossil-fuel is used to power the process, the process needs to be substantially lower emissions than conventionally produced cement, which means carbon-neutral but preferably carbon-negative

We are incredibly excited that, to the best of our knowledge, our process meets this criteria, but process is only necessary, not sufficient. To actually do this, we need a world class team to get there. 

Come and join us in our mission!

Opportunities at Brimstone