Office Manager

Join a team of brilliant, passionate innovators determined to transform healthcare. At BillionToOne, we've built a category-defining, publicly traded company on Nasdaq where transparency fuels trust, collaboration drives breakthroughs, and every contribution moves the needle on our mission to make life-changing diagnostics accessible to all. We don't just aim for incremental improvements; we build products that are 10x better than anything that exists today.

Our scientists, engineers, sales executives, and visionaries are united by an unwavering commitment to changing the standard of care in prenatal and cancer diagnostics. This is where cutting-edge science meets human compassion, and every innovation you contribute helps remove the fear of the unknown from some of life's most critical medical moments.

If you're driven by purpose, energized by innovation, and ready to help shape the future of precision medicine at scale, this is where you belong.

We are looking for a passionate and energetic Office Manager to become the go-to person for all office management operations in our state-of-the-art facility and manage our Menlo Park facilities and ensure employee happiness is maximized at all times. The ideal candidate will have the ability to work cross-functionally between many departments to help keep our office. The Office Manager position is an onsite position and reports to the Senior Director of Supply Chain.

• →Own and manage daily office operations and guest experience
• →Contribute to and collaborate with the team by assisting in the day-to-day operations of a rapidly growing molecular diagnostics lab’s office space
• →Responsible for maintaining, ordering, and stocking of snacks and office supplies
• →Greet and direct visitors to BillionToOne in a professional and friendly manner
• →Assist in scheduling and coordinating building tours, interviews, and company site visits
• →Partners cross functionally and support event planning and culture initiatives
• →Help to streamline processes and set-up systems that keep a fast-growing company operating efficiently
• →Maintain relationships with breakroom & office supply vendors and serve as the primary point of contact across various functions
• →Assist with creating and executing a calendar of creative employee appreciation events (birthdays, anniversaries)
• →Liaise with business leaders and key stakeholders to support people team initiatives and new hire on-boarding (temp badge access, office tours, etc.)
• →Advance other activities within the company as needed
• →Assist with creating and executing a calendar of creative employee appreciation events (birthdays, anniversaries)
• →Help keep the office pleasant and productive

• College degree preferred but not required

Unity Complete™ is the only non-invasive prenatal screen capable of assessing fetal risk for both common recessive conditions and aneuploidies from a single maternal blood sample. Our Northstar® liquid biopsy test uniquely combines treatment selection with real-time monitoring, giving oncologists unprecedented precision in cancer care.

From $0 to $150M+ in Annual Recurring Revenue in just five years. In 2025, we completed one of the most successful IPOs for a medical diagnostics company, building on nearly $400M in private funding,including our $130M Series D in 2024 and backed by world-class investors including Hummingbird, Adams Street Partners, Neuberger Berman, Baillie Gifford, and Premji Invest.

Forbes named us one of America's Best Startup Employers for 2025 and we're Great Place to Work certified, with 100% of our people willing to go the extra mile, even as we've scaled to over 700 employees.

Headquartered in Menlo Park with facilities in Union City, CA, and a new lab opening in Austin, TX in 2027, we're continuing to push the boundaries of what's possible in molecular diagnostics. We're just getting started.

Ready to help us change the world, one molecule at a time? Learn more at billiontoone.com