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.
Position OverviewWe are seeking a highly organized, proactive, and detail-oriented Executive Assistant to support the CEO. This role is critical to ensuring the CEO can operate efficiently in a fast-paced environment. The ideal candidate thrives on managing complex schedules, executing projects, anticipating needs, and keeping priorities organized.
This role requires someone who is highly dependable, adaptable, and able to manage both professional and occasional personal administrative tasks with discretion and professionalism. This position requires you to be in or a commutable distance from Truckee, CA.
Key Responsibilities
Executive Support
Manage the CEO’s calendar, including scheduling meetings, travel, and events across multiple priorities and time zones
Prepare meeting agendas, briefing materials, and follow-up action items
Screen and prioritize communications including email, calls, and requests
Coordinate internal and external meetings with senior leaders, partners, and stakeholders
Project Coordination & Execution
Track and help drive key projects and initiatives on behalf of the CEO
Ensure deadlines and deliverables are met by coordinating across teams
Organize documents, reports, and presentations needed for decision-making
Assist in preparing presentations, board materials, and executive reports
Operational & Administrative Support
Arrange travel itineraries, accommodations, and logistics
Maintain organized systems for files, notes, and key information
Assist with planning company meetings, offsites, and events
Handle confidential information with discretion
Personal Assistance
Support personal administrative needs for the CEO (scheduling appointments, errands, etc.)
Coordinate and manage contractors
Help manage scheduling conflicts between personal and professional commitments
Qualifications
2–7+ years of experience as an Executive Assistant supporting senior executives or founders
Exceptional organizational and time management skills
Ability to manage multiple priorities in a fast-paced environment
Strong written and verbal communication skills
Highly proactive with strong problem-solving abilities
Ability to maintain confidentiality and professionalism
Proficiency with productivity tools such as Microsoft Office, Asana, Slack, and calendar management tools
Key Traits for Success
Highly organized and detail-oriented
Fast-moving and adaptable
Strong executor who follows through on projects
Anticipates needs before they arise
Calm under pressure
Trustworthy and discreet
Why This Role Matters
This position is a trusted partner to the CEO, helping manage priorities, execute initiatives, and create the structure that allows the CEO to focus on the highest-impact work.
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.
Top Skills
What We Do
Cement is responsible for about the same amount of greenhouse gas emissions as all of the cars on the road today worldwide. Cement has been widely considered one of the most difficult materials to decarbonize and has even been called out as the reason why we need point-source CCS. We have invented a way to make carbon-negative Portland cement that does not rely on point-source CCS and is identical to conventional cement and, most importantly for impact, is lower in cost. Simply put, our process will turn one of the most intractable climate problems into a carbon-negative climate solution.
We have more than a dozen positions open for chemical engineers, chemists, metallurgists, 1st Policy person, 1st Business Development person, and more, please visit our website!
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