Assistant General Counsel

A Rare Opportunity to Shape the Future of Genomics

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.

BillionToOne is looking to hire an Assistant General Counsel, its fifth attorney, for its growing Legal & Compliance team to advise on a variety of issues. This role will have a significant impact on developing and implementing legal and compliance policies, practices, and systems. You will partner and collaborate with members of our Finance, Sales, Market Access, Reimbursement, R&D, Marketing, Supply Chain, and HR teams. This role reports to our General Counsel, Chief Compliance Officer & Secretary and can be located onsite, hybrid, or fully remote (with occasional travel).

Responsibilities:

• Proactively identify and address legal and compliance risks across Product, Marketing, Commercial Operations, Market Access/Reimbursement, Research & Development, People Ops and Finance — anticipating issues rather than waiting to be asked
• Independently identify gaps in existing policies and processes and drive build-out of compliance infrastructure 
• Develop processes and infrastructure to ensure compliance with applicable external requirements, soliciting feedback from internal stakeholders, preparing and drafting policies/SOPs and overseeing implementation and training in a variety of areas
• Advise on company contracts, including drafting, negotiating, reviewing, interpreting, and managing strategic, high-value contracts 
• Take ownership of legal questions in unfamiliar subject areas — research, collect business input, and drive to resolution with appropriate escalation
• Partner with legal team members to develop and build legal and compliance infrastructure and program for lab services/life science organization

Requirements:

• Genuine interest and ability to learning new areas of law and business, with a proven track record of taking on projects in unfamiliar areas and driving them to completion
• Ability to be highly resourceful, adaptable, creative and nimble in a high-growth, fast-paced environment
• Track record of taking on unfamiliar legal problems with minimal oversight and driving them to a positive result for the business
• Comfortable operating with significant autonomy and ambiguity in a lean legal team, making judgment calls without a playbook
• JD and licensed to practice law in one or more US jurisdictions
• 5+ years of experience in a law firm and/or in-house legal department, ideally with exposure to life science or health care organizations
• Experience advising commercial leaders and colleagues on business strategies, product promotion, sales programs and transactions and other commercial initiatives.
• Experience developing processes to comply with legal/regulatory requirements, drafting and implementing policies and procedures, and delivering employee training
• Exposure to some combination of the following subject areas: commercial compliance, securities/corporate governance, contract drafting and negotiation, intellectual property, and labor and employment matters
• Strong team-player with willingness to roll-up sleeves and pitch in wherever needed
• Strong leadership skills, with ability to clearly communicate effective legal solutions to leadership and colleagues in a collaborative yet consultative way that meet business objectives yet appropriately mitigate risks

Nice-to-Haves:

Familiarity with some or all of the following:

• Start-up, emerging high-growth company experience
• Molecular diagnostics/genetic company or CLIA lab

Benefits And Perks:

• Working alongside brilliant, kind, passionate and dedicated colleagues, in an empowering environment, toward a global vision, striving for a future in which transformative molecular diagnostics can help millions of patients
• Open, transparent culture that includes weekly Town Hall meetings
• The ability to indirectly or directly change the lives of hundreds of thousand patients
• Multiple medical benefit options; employee premiums paid 100% of select plans, dependents covered up to 80%
• Extremely generous Family Bonding Leave for eligible employees (16 weeks, paid at 100%)
• Supplemental fertility benefits coverage 
• Retirement savings program including a 4% Company match
• Increase paid time off with increased tenure
• Latest and greatest hardware (laptop, lab equipment, facilities)
• Free daily on-site lunches provided from top eateries
• A variety of perks on campus (state of the art gym, restaurant)
• Free on-site EV charging (compatible with all EVs, including Tesla)

At BillionToOne, we are proud to offer a combination of a (1) base pay range (actual amount offered is based on experience and salary/equity options split that the candidate chooses), (2) generous equity options offering, (3) corporate bonus program, on top of (4) industry leading company benefits (free healthcare options, 401k match, very generous fully paid parental leave, etc.).

For this position, we offer a total compensation package up to $383,156 per year, including a base pay range of $241,165 - $267,962 per year.

BillionToOne is an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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BillionToOne is a next-generation molecular diagnostics company on a mission to make powerful, accurate diagnostic tests accessible to everyone. Our revolutionary QCT molecular counting technology enhances disease detection resolution by over a thousandfold using cell-free DNA,a breakthrough that has already transformed the lives of over half a million patients worldwide.

Our Impact

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.
Unity Confirm™ enables non-invasive confirmation for high-risk screening results through the capture of intact circulating fetal cells using BillionToOne’s Fetal Cell Capture™ Technology.
Our Northstar® liquid biopsy test uniquely combines treatment selection with real-time monitoring, giving oncologists unprecedented precision in cancer care.

Our Growth

From $0 to $400M+ annualized revenue run-rate in just 6 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.

Our Recognition

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.

Our Future

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.

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