Laboratory Technician

Oakland, CA /
R&D /
Full Time - On Site
About Us
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).

You Should Join Us If You:
Are passionate and motivated about our mission to fight climate change
Have an insatiable sense of curiosity and a drive to solve problems
Thrive in a fast-paced collaborative startup environment 
Want to work with a fun, mission-aligned, and values-oriented team

Position Overview

    • Support Brimstone’s engineering units by performing sample preparation, tests, lab maintenance, and lab operations.
    • Conduct chemical and physical tests for concrete materials according to ASTM standards.
    • Process raw rock materials for experiments.
    • Collaborate and work with teammates synergistically.


    • Completion of high school or equivalent.
    • Familiarity with ASTM standards for cement and concrete testing.
    • Ability to operate mechanical (e.g., crushing, pressing) equipment after receiving job-specific training.
    • Fundamental understanding of concrete and its constituents, including portland cement.
    • Ability to comfortably lift and move up to 40 pounds of materials without assistance.
    • Strong commitment to work safety.
    • Strong communication skills, including written, verbal, and concise presentation of technical concepts.
    • Strong affinity for teamwork and interpersonal skills. Ability to take initiative for the advancement of the team.

Desirable Experience

    • Bachelor’s degree
    • 5+ years of experience working in a concrete-related laboratory or performing concrete-related fieldwork.
    • Possess testing certifications from ACI, Caltrans, or NICET.
    • Experience working in a machine shop.
    • Comfortable with tools such as Microsoft Suite, 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.