Leadership Team

Bill O’Neil

Bill O’Neil is a Principal Software Engineer at Vivli.

Prior to joining Vivli, Bill worked at Parexel International where he led teams developing and implementing applications for supporting clinical trials, including the management of documents for same.  Prior to Parexel Bill was with various commercial ERP software companies developing critical applications for business, including material management for manufacturers, order management, and SharePoint administration.

Rebecca Li, PhD

Rebecca Li, PhD, is the CEO of Vivli and on faculty at the Center for Bioethics at the Harvard Medical School.  Previous to her current role she was the Executive Director of the MRCT Center of Brigham and Women’s Hospital and Harvard for over 5 years and remains a Senior Advisor at the Center.  She has over 25 years of experience spanning the entire drug development process with experience in Biotech, Pharma and CRO environments. She completed a Fellowship in 2013 in the Division of Medical Ethics at Harvard Medical School.  She earned her PhD in Chemical and Biomolecular Engineering from Johns Hopkins University. 

Alex Senra

Alex joined the Vivli team in 2024 as an Executive Assistant where she provides support to our team.

Prior to joining Vivli, Alex worked with a boutique immigration law firm as a Law Clerk, supporting the partners and preparing substantive legal documents. Alex holds a Bachelor of Science degree in Legal Studies.

Lewis Seton

Lewis Seton, MBA is the Grants and Finance Administrator of Vivli. He also serves as Senior Grants Administrator in the Division of Global Health Equity at Brigham and Women’s Hospital. In this position, he oversees finance and compliance for approximately 100 research grants from a variety of federal and philanthropic sponsors, most of which are focused internationally.

He became a Certified Research Administrator in 2013 through the Research Administrators Certification Council and received his MBA with a focus in Public and Nonprofit Management in 2017 from Boston University.

Sarah Sweet

Sarah is a Senior Clinical Research Manager at Vivli. She received a Bachelor of Science in Biomedical Science (BS) from Salem State University in 2015 and a Master of Science in Biotechnology, Bioinformatics (MS) from University of Maryland in 2022.

Prior to this role, Sarah has worked in a Molecular Biology laboratory as an Associate Scientist at Azenta Life Sciences. Most recently, she worked at a precision oncology company, Guardant Health, which specializes in liquid biopsy. Here, she served as a supervisor where she led Biospecimen management operation teams in the San Diego and Redwood City laboratories and gained experience in clinical trial sample management and clinical trial project coordination.

Mark Barnes, JD

Mark Barnes, J.D., law practice and his teaching at Yale focus on health care law and finance, human and animal research, stem cell and genetic research, research grants and contracts, research misconduct, and international research. Mr. Barnes formerly served at Harvard as the Senior Associate Provost and University Senior Research Officer and started and directed Harvard’s HIV/AIDS treatment programs in Nigeria, Tanzania and Botswana.  He serves on the Ethics Working Group of the NIH’s HIV Prevention Trials Network (HPTN) and is the ethics advisor to HPTN Trial 071 in South Africa and Zambia. Mr. Barnes has held senior appointed positions in the New York City and State departments of health.

Subha Madhavan, PhD

Subha is a dynamic and results-driven leader with a strong track record of excellence in organizations that operate at the nexus of science, technology and business. She has initiated and successfully directed several productive clinical research and development programs at the Georgetown Lombardi Comprehensive Cancer Center, MedStar hospital network, FDA, NIH and BioPharma industry. She was co-leader of the FDA’s Center for Excellence in Regulatory Science and worked with the Oncology and Vaccine teams. She was an advisory member to the Biden Foundation’s Cancer Moonshot Program and advised on pre-competitive data sharing initiatives across Pharma, Health Tech companies and research organizations to drive innovation. She has been recognized for her work through several awards including the Service to America award in the Science and Environment category (2005), Research Acceleration Award by AACR and Pancreatic Cancer Action Network (2015), and Women in Tech Global award (2021). She is currently the Head of Clinical AI/ML & Digital Sciences at Pfizer worldwide R&D where she leads a team focused on advancing precision therapies across multiple treatment areas including Anti-Infectives, Oncology, Immunology & Inflammation among others.

Justin McCarthy, JD

Justin McCarthy has over 27 years of experience in the pharmaceutical industry, with expertise in pricing, market access, global health policy, legal and compliance. In his most recent role, he led the Patient & Health Impact (PHI) team at Pfizer, one of the world’s premier innovative biopharmaceutical companies whose global portfolio includes medicines and vaccines. He led a team of experts in health economics and outcomes research, real-world data and analytics, patient-centered outcomes assessment, market access, pricing, strategy and contracting, to generate evidence of the value of Pfizer medicines and vaccines and negotiate with governments and payers around the world to ensure access for patients. He also formed a team to explore novel approaches to bring medicines to the market through innovative partnerships and payment models.

Previously, Justin led Pfizer’s Global Policy & International Public Affairs efforts, responsible for defining Pfizer’s public policy positions and advancing government and public affairs strategies internationally. Additionally, Justin was Chief Counsel for Pfizer’s Worldwide Research and Development division, advising on regulatory, licensing and clinical trial issues, and overseeing global intellectual property activities.

Justin serves as a health policy and market access advisor, and has previously served on the Secretary’s Advisory Committee for Human Subject Protection, Subcommittee on Harmonization

Brian McCourt

Brian McCourt currently serves as Senior Director, Data and Knowledge Management at Duke Clinical Research Institute. He began his career as a study coordinator at Massachusetts General Hospital and has since held a variety of senior leadership roles spanning Clinical Data Management, Research Informatics and Technology areas at DCRI. His personal interests include the informatics methods and tools needed to operationalize complex industry and government research programs.

With over 25 years at Duke, he has been at the forefront of many strategic efforts to develop the infrastructure and capabilities needed to run demonstration projects and then scale-up capabilities for broader adoption of new best practices. Brian was central to launching DCRI’s Supporting Open Access for Researchers (SOAR) initiative – the set of data preparation, hosting, approval and provisioning practices for sharing of research datasets. Today, in addition to overseeing data operations for many research programs, he is helping drive the development and transition to a new cloud platform for research tools that includes data integration, hosting and visualization services.

Ida Sim, MD, PhD

Ida Sim, MD, PhD is Professor of Medicine at the University of California, San Francisco and co-directs Biomedical Informatics at UCSF’s Clinical and Translational Sciences Institute. Dr. Sim earned her MD and her PhD in Medical Informatics from Stanford University, where her dissertation was on computational methods for data sharing of clinical trial results. She was trained in Primary Care Internal Medicine at the Massachusetts General Hospital, and completed fellowships in General Medicine and Medical Informatics at Stanford.

In 2005-6, Dr. Sim led the World Health Organization’s International Clinical Trials Registry Platform which established the first global policy on clinical trial registration and defined the common 20-item Trial Registration Data Set. She has led multiple NIH and other grants on “trial bank publishing,” ontology-based data sharing of human studies, and clinical trial visualization. Dr. Sim was a member of the 2015 Institute of Medicine committee on “Sharing Clinical Trial Data: Maximizing Benefits, Minimizing Risk.” She joined the MRCT Clinical Trials Data Sharing project in 2015 and is a co-founder of Vivli.

In other work, Dr. Sim is a national leader in mobile health and co-founder of Open mHealth, a non-profit organization building open APIs and tools for integrating mobile health data. She has served on multiple national advisory committees on health information infrastructure for clinical care and research. She is a recipient of the United States Presidential Early Career Award for Scientists and Engineers (PECASE), a Fellow of the American College of Medical Informatics, and a member of the American Society for Clinical Investigation. She is a practicing clinician.