Ready to redefine what's possible in molecular diagnostics?
Join a team of brilliant, passionate innovators who wake up every day determined to transform healthcare. At BillionToOne, we've built something extraordinary—a culture where transparency fuels trust, collaboration drives breakthroughs, and every voice matters in our mission to make life-changing diagnostics accessible to all. We don't just aim for incremental improvements; we strive to build products that are 10x better than anything that exists today. Our people are our greatest asset: talented scientists, engineers, and visionaries united by an unwavering commitment to changing the standard of care in prenatal and cancer diagnostics
.
Here, your impact isn't measured in increments—it's measured in the hundreds of thousands of lives we've already touched and the millions more we're working to reach.
If you're driven by purpose, energized by innovation, and ready to help build the future of precision medicine, this is where you belong.We are looking for a field-based professional Medical Science Liaison (MSL), Oncology with scientific and clinical expertise in oncology to support our oncology portfolio of liquid biopsy products. The Medical Science Liaison (MSL), Oncology is a remote position and reports to our Associate Director, Medical Affairs.Region: US Eastern Time
(Florida, Georgia, North Carolina, South Carolina)
Responsibilities:
- Serve as a key liaison to Health Care Providers (HCPs) in the oncology space regarding liquid biopsy and BillionToOne products
- Serve as a key member of the BillionToOne Oncology Medical Affairs team
- Develop and maintain relationships with key opinion leaders (KOLs) by engaging in scientific exchange with medical and scientific partners
- Support commercial team by providing impactful information that enhances the value and proper use of BillionToOne products
- Respond to HCP customer inquiries to provide focused and balanced clinical and scientific information that supports the appropriate use of or clinically differentiates BillionToOne's products and services
- Contribute to development of provider and patient educational products
- Adhere to internal standard processes and comply with regulatory and compliance requirements
- Other duties as may be assigned
Requirements:
- Advanced degree in a related science or health discipline
- 2+ years of experience as a Medical Science Liaison or similar position in oncology, diagnostic experience preferred
- Expertise in discussing scientific content and context to multiple audiences
- Excellent communication and interpersonal skills
- Ability to travel up to 70%
Benefits And Perks:
- Working with a team of ‘rockstars’ who bring out the best in everyone
- 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 at 80%
- Extremely generous Family Bonding Leave for new parents (16 weeks, paid at 100%)
- Retirement savings program including a 4% Company match
- Free daily on-site lunches provided from top eateries
- Latest and greatest hardware (laptop, lab equipment, facilities)
- 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 of $225,027, including a base pay range of $161,262 - $182,070 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.For more information about how we protect your information, we encourage you to review our Privacy Policy.
About BillionToOne
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's already transformed the lives of over 500,000 patients worldwide.
Our Impact:
We've pioneered game-changing diagnostic solutions that are redefining industry standards.
Unity Complete™ stands as the only non-invasive prenatal screen capable of assessing fetal risk for both common recessive conditions and aneuploidies from a single maternal blood sample. In oncology, 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 $125 million in Annual Recurring Revenue in just four years. We've raised close to $400 million in funding, including a $130 million Series D round in June 2024, achieving a valuation of over $1 billion. This backing comes from world-class investors including Hummingbird, Adams Street Partners, Neuberger Berman, Baillie Gifford, and Premji Invest.
Our Recognition:
Forbes recently named us one of
America's Best Startup Employers for 2025, and we were awarded
Great Place to Work certification in 2024—with an incredible
100% of our people reporting they are willing to give extra to get the job done. These honors recognize not just our innovation but the exceptional culture we've cultivated—one that remains authentically collaborative and transparent even as we've scaled.
Our Future:
Headquartered in Menlo Park with facilities in Union City, California, we're continuing to push the boundaries of what's possible in molecular diagnostics. Recent clinical outcomes data for Unity Fetal Risk Screen and new advances in cancer diagnostics prove we're just getting started.
At BillionToOne, you'll join a diverse team of passionate innovators who believe that the best science happens when brilliant minds collaborate openly, think boldly, and never lose sight of the patients whose lives depend on our work.Ready to help us change the world, one diagnosis at a time?Learn more at www.billiontoone.com
