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.

We are looking for a detail oriented Accessioner (Part-Time) to be responsible for assisting with the day-to-day laboratory preparation and equipment maintenance in the Clinical Laboratory. The Accessioner will also be responsible for the accessioning of clinical specimens, performing quality assurance procedures, and complying with all local, state, and federal laboratory requirements. The nature of the work performed by an Accessioner requires excellent attention to detail, effective written and verbal communication skills, the ability to multitask, and the ability to work both independently and in a team environment.

This is a part-time position (24 hours/week maximum) with Saturday 8am-4:30pm required.

Responsibilities:

Perform sample accessioning procedures according to the laboratorys standard operating procedures
Prepare documents for equipment and personnel records
Perform and document routine maintenance of equipment
Prepare other clinical documentation as required and assigned
Clean labware, equipment, and benches
Prepare reagents required for testing
Write and review controlled documents as assigned

Qualifications:

Bachelors degree or equivalent in biology-adjacent field, or student currently pursuing biology degree
Able to integrate and apply feedback in a professional manner
Strong attention to detail
Able to manage daily specimen processing needs with high emphasis on quality
Able to analyze and problem solve basic issues that impact test performance
Able to proactively communicate consistently, clearly, and honestly

Nice-To-Haves:

Clinical Laboratory experience or equivalent high complexity and volume laboratory experience
Laboratory experience within the last year preferred

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 thousands patients
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 (1) competitive base pay and (2) the opportunity for professional growth.

For this position, the base pay rate is $21.44 per hour.

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.

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 Confirmenables non-invasive confirmation for high-risk screening results through the capture of intact circulating fetal cells using BillionToOnes 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.

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

Accessioner, Prenatal (Part-Time)

BillionToOne

Job Description