Accessioner (Part-Time)

BillionToOne is a next-generation molecular diagnostics company dedicated to developing powerful and accurate diagnostic tests that are accessible to all. Our innovative QCT molecular counting technology significantly enhances the resolution of disease detection using cell-free DNA by over a thousandfold. This groundbreaking technology is integral to our product offerings, including one of our flagship products, Unity Complete™, the only non-invasive prenatal screen capable of assessing fetal risk for both common recessive conditions and aneuploidies from a single maternal blood sample. Leveraging the same molecular counting technology, we've expanded our impact into oncology in 2023 with a pioneering liquid biopsy test, Northstar®, that combines treatment selection with monitoring. To date, over 500,000 patients have benefited from our innovative and precise diagnostic tests, and our Annual Recurring Revenue (ARR) has grown from $0 to $125 million in the last ~4 years.

BillionToOne has successfully raised close to $400 million in funding, with a notable $130 million Series D round completed in June 2024, resulting in a company valuation of over $1 billion. This funding has come from prestigious global institutional investors, including Hummingbird, Adams Street Partners, Neuberger Berman, Baillie Gifford, and Premji Invest. BillionToOne has recently been recognized by Forbes as one of America's Best Startup Employers for 2025, highlighting the company's exceptional work environment and commitment to innovation.

Our team has grown significantly and despite substantial growth, we have successfully maintained the unique culture that has defined BillionToOne from inception, continuing to cultivate a team that is not only diverse and passionate but also innovative. Headquartered in Menlo Park, California, with an additional facility in Union City, California, BillionToOne remains at the forefront of significant advances in molecular diagnostics, evidenced by the recent announcement of clinical outcomes data for its Unity Fetal Risk Screen and new advancements in cancer diagnostics. For more detailed information about BillionToOne and its groundbreaking work, please visit our website at www.billiontoone.com.

We are looking for a detail oriented Accessioner 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 be flexible with scheduling, and the ability to work both independently and in a team environment.

Shift: Flexible schedule, part-time role (24 hours/week max), Saturdays 8:00 am - 4:30 pm required

Responsibilities:

• Perform specimen receipt and accessioning according to the laboratory’s standard operating procedures
• Maintain equipment according to the laboratory’s standard operating procedures
• Clean labware, equipment, and benches
• Prepare documents and binders for equipment and personnel records
• Document all corrective actions taken when test systems deviate from the established performance specifications
• Perform and document routine preventative maintenance
• Prepare reagents required for laboratory preparation
• Communicate effectively with coworkers and non- laboratory personnel
• Report all concerns of accessioning quality and/or safety to the Laboratory Director, Supervisor, or Safety Officer
• Participate in inspection preparation activities
• Review of controlled documents as assigned
• Participate in the training of new accessioning personnel on current procedures including the following:
• Provide hands-on training
• Provide guidance, feedback, and mentorship while respecting various learning styles
• Ensure appropriate documentation is reviewed and completed
• Participate in training meetings
• Prioritize a positive work environment
• Exhibit a dedication to team work above and beyond scheduled daily work
• Participate in projects and process improvements for sample receipt and accessioning

Requirements:

• Student in pursuit of a Bachelor's Biology degree or related life sciences degree
• Laboratory experience within the last year preferred
• 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
• Strong computer skills preferred
• Able to proactively communicate consistently, clearly, and honestly
• One year of Clinical Laboratory experience or equivalent high complexity and volume laboratory experience preferred

Nice-To-Haves:

• Start-up experience
• Bachelor’s degree 

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

For this position, the base pay rate is $20.80 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.

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