Mark Gerson, Chairman

Mark Gerson is the Executive Chairman of Gerson Lehrman Group, which he co-founded in 1998 and of Coverago, which he co-founded in 2008.  He is also the Chairman of United Hatzalah (, a volunteer network of 1,500 first responders to pre-hospital trauma in Israel.   Mark is the author of In the Classroom (Free Press: 1997), The Neoconservative Vision: From the Cold War to the Culture Wars (Madison Books: 1995) and the editor of The Essential Neoconservative Reader (Addison Wesley: 1996).  He has also written numerous articles and essays which have been published in newspapers and magazines, including The New Republic, Commentary, Reader's Digest, USA Today, and the Wall Street Journal.  Mark lives with his wife, Rabbi Erica Gerson, and their sons, Joshua and Elijah, in New Jersey.

Mr. Gerson is a graduate of Williams College and received his JD from Yale Law School.


Jon Fielder, MD, Chief Executive Officer

Dr. Fielder graduated summa cum laude from Williams College, where he was elected to Phi Beta Kappa, and with honor from Baylor College of Medicine, where he was elected Alpha Omega Alpha.  He trained in internal medicine at the Johns Hopkins Hospital and was named “Most Oslerian” during his internship.  From 2002 until 2006 he served as a medical missionary at Kijabe Hospital in central Kenya.  In 2006 he acted as senior technical advisor with the Institute of Human Virology of the University of Maryland, providing clinical direction to the AIDSRelief consortium.  In 2008 he returned to Africa as a medical missionary to work at the Partners in Hope Medical Center in Lilongwe, Malawi.  He has published 15 peer-reviewed articles and is the author of “Tuberculosis in the Era of HIV:  A Clinical Manual for Care Providers Working in Africa and Other Resource-Limited Settings.” 

Dr. Fielder and his wife Amanda are missionaries serving with SIM.  They live with their two sons and daughter in Lilongwe, Malawi.


Sean Fieler, Member

Sean Fieler graduated from Williams College in 1995 with a degree in Political Economy and was the 1994 recipient of the Branson Memorial Scholarship.   Upon completion of his undergraduate studies, he joined Equinox Partners, L.P.  In 2001, he was named a managing member of Equinox Partners, L.P. and the Kuroto Fund, L.P.  

Mr. Fieler is chairman of the American Principles Project and of the National Bible Association.  He is a board member of the Witherspoon Institute, Institute for American Values, and the Dominican Foundation.

Mr. Fieler lives in Princeton, New Jersey with his wife, son and daughter.


Scott Marcello, Member

Scott is currently the National Leader of KPMG’s U.S. Financial Services business and member of KPMG’s Board of Directors.  He has also served in a variety of other leadership and client service roles over his 27 year career. Scott joined KPMG in 1985 and has served in 5 different offices, including our New York operating and National offices. Over his career, he has served some of our largest financial services clients in various capacities and has been a frequent speaker on behalf of the firm at industry, client, and other forums. Scott received both his Bachelor’s and Master’s degrees in accounting from Stetson University in Deland, Florida.

Mr. Marcello serves on the board of the St. John's School of Risk Management and Actuarial Sciences and Heritage Christian School, and is board member and treasurer of the Greater New York Chapter of the Cystic Fibrosis Foundation.


Pavi Thomas, Treasurer

Pastor Thomas is the lead pastor of Heritage Christian Church (Westerville, OH), which provides administrative support to the Foundation.  member of the senior leadership team of Great Commission Ministries since 1995, he’s served as a lead pastor, church planter, respected teacher and mentor, and developer of a sophisticated distance-education theological model. Pavi holds a PhD from OSU, is the creator of eight graduate-level courses, and has been the main session speaker at conferences on several continents.


Jonathan Mwiindi, Secretary and Executive Director for Program Development

Mr. Mwiindi is a native of Kenya, where he trained as a pharmacist.  He joined Kijabe Hospital in 2003, first as pharmacy manager and later as director of Kijabe AIDSRelief.  In addition to facilitating the rapid expansion of one of the country’s largest HIV treatment programs, Mr. Mwiindi also oversaw several large construction projects.  He has served as consultant to the Ecumenical Pharmaceutical Network, a role which afforded him the opportunity to travel widely in Africa and to become intimately acquainted with the mission healthcare system.  In 2006 he became Kenyan country manager for the Institute of Human Virology of the University of Maryland School of Medicine.  In that role he established the school’s in-country office of over 20 employees.  He has been responsible for the management of millions of dollars in private and US government funds.  Since 2009 he has served as manager of the global health program at the University of Texas-Medical Branch in Galveston.

Mr. Mwiindi is married to Dr. Lily Kwatampora.  They live in Dickinson, Texas with their two sons.