Created by Californians, for Californians


Manifest MedEx leadership is comprised of experienced healthcare industry veterans reporting to the Board of Directors.

Claudia Williams

Chief Executive Officer

Claudia Williams is the Chief Executive Officer of Manifest MedEx, bringing over 20 years’ experience catalyzing and scaling change and innovation in healthcare. She was previously Senior Advisor for Health Technology and Innovation at the White House where she helped lead the President’s Precision Medicine Initiative and collaborated with private and public partners that are leveraging HITECH, new payment models and open data to remake the digital landscape in health care. Before joining the White House, Williams was Director of Health Information Exchange at HHS, galvanizing national progress on health information sharing between providers, with patients and for research. Prior to joining HHS, she was Director of Health Policy and Public Affairs at the Markle Foundation, where she led Connecting for Health, a 100 member public-private collaborative of technology, provider, consumer and health plan leaders working to improve health and health care through health IT. She holds an MS in Health Policy and Management from the Harvard School of Public Health and a BA from Duke University. She served as a Peace Corps volunteer in Botswana.

Gerald Peters

General Counsel

Gerald Peters is a former Chair of Latham & Watkins’ Healthcare Practice Group.  His practice focused on business, transactional and regulatory matters for healthcare clients, including healthcare systems, hospitals, physician groups and payers. Jerry often served as lead attorney in transactions requiring strategic business planning, particularly mergers, acquisitions, joint ventures, development of integrated healthcare systems, medical practice consolidation and contract negotiation.
Chambers USA and The Best Lawyers in America recognized Jerry for his healthcare expertise. Nightingale’s Healthcare News named him one of the 12 “Outstanding Health Care Transaction Lawyers.” He was ranked as one of America’s top 10 healthcare lawyers in Legal Media Group’s Guide to Leading U.S. Lawyers, and inducted into the American Health Lawyers Association’s inaugural class of Fellows.
Jerry has published two books on healthcare business transactions, co-authored four other books on healthcare topics, published numerous articles, and was a frequent speaker in the U.S. for over 20 years. He served as an adjunct professor of Healthcare Law at the University of San Francisco School of Law.  He is currently a board member at Huckleberry Youth Programs and Hospice by the Bay. He is a former board member of the American Health Lawyers Association.

Greg LeClaire

Chief Financial Officer

Greg LeClaire has extensive experience in finance and accounting and has served as chief financial officer for a number of different start-up and publicly traded healthcare, technology, and manufacturing companies. Prior to joining Cal INDEX, Greg served as chief financial officer for three companies within Aetna Inc.’s Healthagen division, including Medicity, Inc., a provider of health information exchange and technology enablement solutions; HDMS, Inc. a provider of analytical healthcare reporting tools and Population Health IT, a centralized Healthagen software development organization. Prior to that, he served as chief financial officer for ClearOne Communications, Inc., a communications solutions company and for Utah Medical Products, Inc., a specialty medical device manufacturer. He also has consulted for and served as chief financial officer and vice president of finance and administration for a number of early-stage startup companies.

Greg holds a master’s degree in management from Stanford University’s Graduate School of Business and a bachelor’s degree in accounting from the University of Utah.

Leo Pak

Chief Technology Officer

Leo is a transformational technology leader with progressive healthcare IT experience in delivering strategic, goal-drive innovative technologies. Leo is an experienced HIE executive. He was recently with the New York E-Health Collaborative, the HIE technology organization for the State of New York as its VP of Product Development. Prior to that he was the Managing Director IT for Evolent Health, a population health management services organization a joint venture with UPMC, and also served as the Staff Vice President of Technology for WellPoint. Leo has over 16 years of management experience in IT working in many different aspect of health care.

Leo has a Health Information Technology Graduate Certificate, Information Management and Exchange Specialists from George Washington University, School of Health and Health Services; a Master’s of Science in Information Systems Technology, Management of Information Systems, George Washington University, School of Business and a Bachelor of Arts, Philosophy and Theology from the University of Scranton.