
Leadership & Board
-
Oguzhan Atay, PhD
Co-Founder, CEO, and Board Chair -
David Tsao, PhD
Co-Founder, CTO, and Board Member
“We did not ask what other people are doing and can we do it better. We asked what is physically possible given the number of molecules in a sample.”

Oguzhan Atay
A BillionToOne co-founder, Oguzhan believes that diagnostics can be made much more powerful, accurate, and affordable if they are engineered to be quantitative. Oguzhan helped develop our proprietary molecular counting platform. He has led the Company since its inception and raised more than $200M in funding including from venture capital funds and investors who previously invested in tech companies such as SpaceX, Box, Spotify, Palantir, Braintree, and biotech companies such as Counsyl, WebMD, and Omada Health.
Oguzhan received his PhD from Stanford University, where his work was published on the Cover of Cell Systems. He graduated summa cum laude and Phi Beta Kappa from Princeton University with a bachelor’s in molecular biology and minors in physics, computer science, and applied mathematics.

David Tsao
A BillionToOne co-founder, David believes that applying engineering principles to biology will be transformative for medicine. He is the original inventor of our molecular counting platform and has presented BillionToOne’s clinical trial results at a variety of national conferences. David oversees all technology developments at BillionToOne.
He received a PhD in bioengineering from Rice University, where he was awarded a Nanobiology training fellowship. David has a bachelor’s degree in physics, cum laude, from Princeton University with minors in biophysics and engineering management systems. While at Princeton, he was twice awarded the Shenstone Prize in Physics.
Other Leaders
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Nipun Soni, CFA, CPA
Chief Financial Officer -
Tom Lynch, JD
General Counsel -
Gary Palmer, MD, MBA, JD
Chief Medical Officer, Oncology -
Shan Riku, MBA
Senior VP of Product -
Nancy Johnson, MT (ASCP)
Senior VP of Sales and Commercial Operations -
Carrie McGehee
VP of Market Access -
John ten Bosch, PhD, FACMG
VP of Laboratory Operations -
Brent Kirk
Senior Director of Sales Strategy and Operations -
Brett Huff, MBA
Senior Director of Engineering -
Jennifer Hoskovec, MS, CGC
Senior Director of Medical Affairs -
Karel Hurka
Senior Director of Supply Chain -
Steven Drucker, MBA
Senior Director, Market Access -
Michele Phelps
Director of Financial Planning and Analysis -
Cortney Cino, MBA
Director of Brand Marketing -
Vaghar Haghiri
Director of People Operations -
David Peterson
Director of Reimbursement -
Amy Sharma, MBA
Director of Product, Prenatal -
Dhruv Swaroop, MBA
Director of Product

Nipun Soni, CFA, CPA
Chief Financial Officer
Nipun Soni joined BillionToOne in March 2021. He brings 20 years of finance, accounting, and operations experience with multi-national companies in the healthcare and technology sector. Prior to joining us, he served as SVP Finance at Guardant Health from July 2019 to March 2021, helping scale the finance organization for a growing public company. Between April 2009 to July 2019, he held various senior finance leadership positions with multinational public companies including Quotient Technology, KLA Corporation, and Oracle Corporation.
Earlier in his career, Nipun worked at PricewaterhouseCoopers serving clients in both public and private sectors. He holds a bachelor’s in commerce from Delhi University, India. He is a CFA Charterholder, Certified Public Accountant licensed in California, and Chartered Accountant from India.

Tom Lynch, JD
General Counsel
Tom Lynch joined BillionToOne as our first General Counsel in October 2022. He brings over 20 years of experience leading life science teams to bring impactful solutions for patients. Prior to joining us, he served as Chief Compliance Officer, Advanced Healthcare Solutions at Fortive Corporation. From 2018 to 2021, Tom served as the Chief Legal Officer at Nuwellis, a publicly traded, medical device company. Tom served as the Chief Administrative Officer and General Counsel at Orexigen Therapeutics, a publicly traded, biotech company, from 2015 to 2018. Between 2002 and 2015, he held various senior legal and compliance positions at Boston Scientific Corporation and Novartis Pharma, including three years heading the global Neuroscience legal team in Switzerland.
Tom began his legal career representing public and private companies at Dorsey & Whitney LLP. He holds a bachelor’s degree from Stanford University, a juris doctorate degree from Boston College Law School and a master’s degree in teaching from University of St. Thomas.

Gary Palmer, MD, MBA, JD
Chief Medical Officer, Oncology
Dr. Palmer joined BillionToOne in January 2023 as Chief Medical Officer, Oncology. He has held senior leadership positions at multiple successful biotechnology companies. He was Vice President of Medical Affairs at Genomic Health. He served as Chief Medical Officer of On-Q-ity, a circulating tumor cell company. Subsequently, he was Senior Vice President, Medical Affairs at Foundation Medicine, Chief Medical Officer at NantHealth, and most recently Chief Medical Officer at Tempus. Prior to these and several other roles in industry, Dr. Palmer served as a medical oncologist in both academia and in the community setting, including serving as the director of the Medical Breast Service at the University of California, Davis, Cancer Center and Chief of Medical Oncology at the Mercy Health System, Sacramento, California.
Dr. Palmer is a magna cum laude graduate of Yale University and a graduate of the Stanford University School of Medicine. He did his internal medicine training at the Boston City Hospital and his oncology fellowship at the Massachusetts General Hospital. He has a Masters in Business Administration (MBA) from the University of California, Davis, and a Masters in Public Health (MPH) from U.C.L.A. As well, Dr. Palmer holds a J.D. degree and is admitted as an attorney to the State Bar of California.

Shan Riku, MBA
Senior VP of Product
Shan joined BillionToOne in January 2019. She oversees clinical and software product management, marketing, clinical, and medical affairs at BillionToOne. Shan is passionate about developing and delivering life-changing diagnostic products to patients and providers.
She has over 15 years of experience in launching and managing a wide range of products from software products to precision diagnostics clinical assays. Shan started her career at McKinsey & Co., where she worked with Fortune 100 companies on various product, branding, and go-to-market strategy projects. Shan holds an MBA from Stanford University, an MPA/ID from Harvard University, and graduated Phi Beta Kappa with a Bachelor of Science in Chemistry from Massachusetts Institute of Technology.

Nancy Johnson, MT (ASCP)
Senior VP of Sales and Commercial Operations
Nancy joined BillionToOne in 2019. Nancy has a passion for building and leading commercial sales teams. She believes in the empowerment of individuals to achieve personal and professional goals. Nancy brings more than 20 years of diagnostic sales leadership experience in both start-up and large-scale sales organizations. Most recently Nancy played an instrumental role in Foundation Medicine’s commercial strategy and execution, building and leading her sales team to success. Prior to Foundation Medicine, she held several commercial leadership positions at various molecular diagnostic companies.
Nancy started her career as a board-certified Medical Technologist and holds a BS in Medical Technology from Creighton University.

Carrie McGehee
VP of Market Access
Carrie McGehee joined the BillionToOne team in August 2021. Carrie is passionate about expanding access to novel diagnostic tests and is recognized for her ability to gain coverage and contracts with Medicare, Medicaid, and private insurance companies. Her work has been defined by developing and implementing strategic and innovative ways to overcome challenges that accelerate top and bottom-line growth. Carrie brings over 20 years of experience working with molecular diagnostic companies and has held several leadership positions including 11 years at Genzyme Genetics and 6 years at Sequenom Center for Molecular Medicine, the first company to bring non-invasive prenatal testing (NIPT) to the market. Carrie and her team were instrumental in policy development for NIPT and contracted with over 200 payers in the US.
Carrie started her career in healthcare as a neonatal intensive care and pediatric Registered Nurse. She graduated from North Texas Central College with a degree in Nursing.

John ten Bosch, PhD, FACMG
VP of Laboratory Operations
John joined BillionToOne in September 2020. He has a passion for genomics, laboratory medicine, and providing quality care to the patients he serves. John has over 10 years of experience providing leadership to high complexity CLIA laboratories including regulatory oversight, clinical laboratory operations, and test development. He joins BillionToOne from Kaiser Permanente where he served both as Laboratory Director and Director of Quality in the Molecular Pathology and Cytogenetics laboratories.
John received his PhD in Molecular and Cell Biology from UC Berkeley and served as a Postdoctoral Fellow in Laboratory Genetics and Genomics at Stanford and UCLA.

Brent Kirk
Senior Director of Sales Strategy and Operations
Brent joined BillionToOne in July 2019. He believes that one size does not fit all with hospitals, physicians, and patients. Brent drives our sales strategy and operations teams to ensure customer loyalty while improving the satisfaction of both internal and external partners. An unrelenting executionist, Brent has fiercely loyal customers and has helped multiple start-ups with hyper-growth plans from series A through IPO.
Brent graduated from the University of Arizona and has a history of success in the tech and biotech industries.

Brett Huff, MBA
Senior Director of Engineering
Brett joined BillionToOne in March 2021 bringing a wide variety of experience in engineering leadership. He led the enterprise engineering department at Trello through its high growth phase, acquisition, and establishment as a market dominator. Previous to that, he led the Equities Exchange and Equities System Test teams at Goldman Sachs, responsible for accurately and quickly performing billions of dollars worth of trades every day across all stock and options exchanges throughout the Americas.
Brett started his career building and commercializing a computer network in an oil and gas drill pipe, drastically increasing the safety, speed, and accuracy of oil and gas exploration. He received his Master of Business Administration degree from the University of Utah and his bachelor’s degree in computer science with a minor in physics from Brigham Young University.

Jennifer Hoskovec, MS, CGC
Senior Director of Medical Affairs
Jennifer joined BillionToOne in July 2020. As a certified genetic counselor with over 17 years of clinical experience, Jen is committed to ensuring patients and providers are supported and educated about the options and utility of prenatal testing. Jen joins BillionToOne after 17 years as a prenatal genetic counselor at UTHealth where she led a team of genetic counselors providing patient care in MFM clinics across the city of Houston. Jen has extensive volunteer and leadership experience within national societies such as American College of Obstetrics and Gynecology and National Society of Genetic Counselors. She served as president of NSGC in 2014.
Jen earned her MS in genetic counseling from the University of Texas Health Science Center in Houston and her Bachelor of Science in Biology with a minor in Chemistry from Truman State University.

Karel Hurka
Senior Director of Supply Chain
Karel joined BillionToOne in March of 2022. He brings 20+ years of experience in all facets of supply chain and materials management spanning inventory management, purchasing, ERP systems, cold chain, production planning, warehousing operations, and vendor & CMO management. His past biotech work experiences include Pendulum Therapeutics, CareDx, Adaptive Biotechnologies, Genomic Health, and Applied Biosystems.
Karel Started his career with Monsanto upon graduation from the University of South Carolina with a BS in Business Administration – Finance.

Steven Drucker, MBA
Senior Director, Market Access
Steven Drucker joined the BillionToOne team in May 2022. Steven is passionate about market access strategy and working to drive growth through data-centric initiatives. He has over 23 years of experience in the pharmaceutical and diagnostics industries, with a proven track record of successful patient access and payer coverage strategies.
Steven most recently served as the Director, Payer Relations and Reimbursement at Foundation Medicine, and has held various customer-facing positions at Castle Biosciences, Genomic Health and Sanofi. Steven is responsible for payer medical policies, contract implementation and revenue pull through.
Steven has a Bachelor of Business and a Master of Business Administration.

Michele Phelps
Director of Financial Planning and Analysis
Michele Phelps joined BillionToOne in September 2021. She is passionate about building efficiencies and scaling processes to allow companies to improve patient care and develop life changing products. She has 18+ years of finance experience in both start-up and multi-national companies in the life sciences and technology industries, with 13+ years focused in the oncology laboratory diagnostic space.
Prior to joining BillionToOne, Michele was at Exact Sciences, where she led FP&A for the Precision Oncology Business Unit and post-merger acquisitions. Before Exact Sciences, as Director of FP&A at Genomic Health, Michele scaled the FP&A team to support four core product launches and international entity and product expansion.
Michele began her career as part of the StubHub start-up team and played a key role in the later acquisition by eBay. Michele has a Bachelor of Science in Corporate Finance and Financial Services.

Cortney Cino, MBA
Director of Brand Marketing
Cortney joined BillionToOne in January 2022. She is dedicated to ensuring BillionToOne’s products have a clear, compelling, and credible story. She’s passionate about our products and growing awareness and education. Cortney brings tremendous marketing experience from both her most recent role as a marketing consultant to several biotechs in the Bay Area and her previous roles at Gilead and Natera. Cortney helped launch a new HIV regimen at Gilead by leading media and disease education for HCPs. At Natera, she was responsible for all aspects of marketing multiple prenatal products.
Cortney started her career in management consulting with Booz Allen Hamilton in Washington DC. She holds an MBA from Boston College and a bachelor’s in communications from UC Santa Barbara.

Vaghar Haghiri
Director of People Operations
Vaghar Haghiri joined BillionToOne in December of 2022 bringing 10+ years of experience supporting rapid growth of various healthcare startup companies, two of which were acquired after Vaghar joined.
Vaghar started his career at CID Management as one of the original 10 employees, where he implemented systems and processes, which helped grow the company to over 1000 employees in less than a year, leading to the acquisition from Genex Services. Vaghar has a Bachelors of Science in Computer Engineering from San Jose State University.

David Peterson
Director of Reimbursement
David joined BillionToOne in June 2021. He identifies and develops system efficiencies and automation while hiring, engaging, and retaining top talent to achieve business goals through coaching, collaboration, and mentoring. David has over 23 years in the healthcare industry as an innovative and strategic business executive with experience leading market access strategy, reimbursement, and managed care initiatives to drive growth. David is recognized for securing coverage and target reimbursement for new technology and focus tests. He is a trusted advisor to key stakeholders, senior management, and cross-functional teams in evaluating new opportunities.

Amy Sharma, MBA
Director of Product, Prenatal
Amy Sharma joined BillionToOne in June 2022 and has 10+ years of experience in marketing, product strategy, and product management across the pharmaceutical, medical device, and molecular diagnostic verticals. Amy is passionate about delivering novel technologies which have the potential to change the clinical paradigm for women’s health. Since 2014, she has focused her career in doing so at companies including Counsyl, Myriad Women’s Health, and DotLab.
Amy started her career as a process engineer and holds a Bachelors of Science from UCLA with a major in Chemical and Biomedical Engineering. She also holds an MBA from Duke University where she focused in Health Sector Management and Marketing.

Dhruv Swaroop, MBA
Director of Product
Dhruv joined BillionToOne in July 2021, after several years spent working in finance, technology and healthcare in the United States, Singapore, and India. He is excited to bring those diverse experiences and perspectives to something he is passionate about—using innovation to improve individuals’ health and quality of life. Dhruv focuses on providing the best technology solutions to patients and providers, including EMR integrations, portals and other software tools that improve turnaround time and efficiency.
Dhruv received his MBA from the MIT Sloan School of Management, where he was awarded the Legatum Center for Development and Entrepreneurship Fellowship, and graduated with a Bachelor of Science in Mechanical Engineering from Carnegie Mellon University.

Swaroop Kolluri
Swaroop Kolluri is a board member at BillionToOne. Learn more about him on the Neotribe website.


Firat Ileri
Firat Ileri is a board member at BillionToOne. Learn more about him on the Hummingbird website.

Tom Bremner
Tom Bremner is a board member at BillionToOne. Learn more about him on the Adams Street website.


Oguzhan Atay
Co-Founder, CEO, and Board Chair
A BillionToOne co-founder, Oguzhan believes that diagnostics can be made much more powerful, accurate, and affordable if they are engineered to be quantitative. Oguzhan helped develop our proprietary molecular counting platform. He has led the Company since its inception and raised more than $200M in funding including from venture capital funds and investors who previously invested in tech companies such as SpaceX, Box, Spotify, Palantir, Braintree, and biotech companies such as Counsyl, WebMD, and Omada Health.
Oguzhan received his PhD from Stanford University, where his work was published on the Cover of Cell Systems. He graduated summa cum laude and Phi Beta Kappa from Princeton University with a bachelor’s in molecular biology and minors in physics, computer science, and applied mathematics.

David Tsao
Co-Founder, CTO, and Board Member
A BillionToOne co-founder, David believes that applying engineering principles to biology will be transformative for medicine. He is the original inventor of our molecular counting platform and has presented BillionToOne’s clinical trial results at a variety of national conferences. David oversees all technology developments at BillionToOne.
He received a PhD in bioengineering from Rice University, where he was awarded a Nanobiology training fellowship. David has a bachelor’s degree in physics, cum laude, from Princeton University with minors in biophysics and engineering management systems. While at Princeton, he was twice awarded the Shenstone Prize in Physics.

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