Thomas has over two decades of experience in health policy and health economics. He was the Director of the City of New York’s Employee Health Benefits Program, which arranges health coverage for over a million city employees, retirees, and their families. He has worked in think tanks, and consulted for businesses, municipalities and nonprofits on health policy and insurance matters. Mr. Jackson is a Director of Nanotronics Imaging, Cell Machines, Inc., and other companies. He serves on the Board of Overseers of Columbia University's Mailman School of Public Health (where he is also President of the Board of its Alumni Association); the Board of Governors of the New York Academy of Sciences, the Board of Directors of the Galen Institute; and the boards of numerous arts and sciences organizations.