Client Services Associate I, Oncology

Client Services Associate I, Oncology

Union City, CA

Ready to redefine what's possible in molecular diagnostics?

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 Client Services Associate I, Oncology to provide exceptional service and support to BillionToOne's customers. This role is part of a broader Client Services organization. The Client Services Associate holds a pivotal role in the organization as he/she will act as the face of BillionToOne for our customers including physicians, Oncology clinics, patients, clinical and auxiliary staff. The CSA will be on the front lines of all internal and external customer inquiries supporting BillionToOne's Oncology tests. The ideal candidate for this role is an ambitious and intelligent individual who is highly self-motivated and can effortlessly help drive and influence a positive patient and customer experience. The Client Services Associate I is a full-time onsite position and reports to the Client Services Manager.

Working hours are Monday to Friday, 8:30 AM to 5:00 PM PT.

Responsibilities:

• Engage customers in a positive and courteous manner to resolve issues and deliver the best possible customer experience.
• Oversee and effectively respond to all types of communication in a professional and articulate manner: phone, email, and web inquiries from customers (physician offices), sales representatives, and patients.
• Handle a variety of inquiries, including questions about our technology, products, and services, status of test results, costs, billing, and insurance coverage.
• Keep precise and clear documentation of all communications and follow-up activities.
• Collaborate with our laboratory to ensure that client information is accurately maintained and help to ensure the timely delivery of test results.
• Contact physicians and other medical personnel to obtain missing information from test orders.
• Enter and qualify new customer information into CRM and LIMS systems.
• Identify issues and trends and collaborate with commercial leadership to develop best practices for internal and external processes.
• Participate in cross-functional projects that extend beyond routine responsibilities to contribute to building a world-class Customer Service organization.
• Represent the organization during intra-department meetings or All Hands meetings as needed.

Qualifications:

• 1+ years of prior client-facing experience.
• 4-year college degree (or equivalent in experience).
• Experience with CRM tools (Salesforce, Zendesk, etc.) is a plus.
• Advanced organizational skills with the ability to handle multiple assignments simultaneously.
• Ability to work in a very fast-paced, demanding environment.
• Outstanding verbal, written, and presentation skills - ability to effectively tailor messages to different audiences.
• Passion for creating a delightful experience for internal and external customers.
• Ability to analyze complex situations independently and implement appropriate solutions.

Nice-To-Haves:

• Proficiency or fluency in Spanish to effectively assist our diverse customer base and ensure a seamless patient and client experience.
• Customer service experience in diagnostic laboratory setting.

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
• Multiple medical benefit options; employee premiums paid 100% of select plans, dependents covered up to 80%
• Extremely generous Family Bonding Leave for new parents (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)
• 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 (1) competitive base pay, (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 $60,107 per year, including a base pay of $28.90 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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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. 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 $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.

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