chairman through April 2011. He also served as chairman of the Aetna Foundation from 2006 to April 2011. During his tenure, Aetna was named Fortune magazine's most admired Company in the Health Care: Insurance and Managed Care category for three consecutive years. Aetna 2011 revenues were $34 billion and the firm ranked 77th on the Fortune 100 list (the year he stepped down as chairman). Joining Aetna in 2001, Williams focused on company's strategy, culture, operating performance and financial results. In 2002, Williams was named president and joined Aetna's board. He was named CEO in February 2006 and chairman of the board in October 2006. In 2001, Aetna reported a net loss from continuing operations of $292 million and earnings per share loss from continuing operations of $0.46. In 2011, full-year operating earnings were $2.0 billion with operating earnings per share of $5.17 producing a 12.3 percent operating EPS CAGR over the last five years. Under his leadership, Aetna worked to catalyze change, focusing the industry, public policy leaders, physicians and employers on issues aimed at increasing access and affordability, and transforming American health care into a more efficient system that delivers greater value to all Americans. He has advocated for specific reforms in broadcast media interviews and has authored or co-authored op-ed articles in The Wall Street Journal, The Washington Post, the Financial Times and the Seattle Post-Intelligencer. Public service Williams chairs the Health Systems Initiative at MIT Sloan, which conducts research and convenes leaders to drive action on the most pressing issues in healthcare. He also serves on MIT's North America Executive Board. Williams is a board member of NAF, a national network of education, business, and community leaders who work together to ensure high school students are college, career, and future ready. NAF partners with high-need communities to build NAF academies focused on growing industries such as health care, IT, finance, hospitality and tourism. In March 2011, Williams was appointed to the President's Management Advisory Board, which was assembled by U.S. President Barack Obama. He served in that capacity until 2017. He serves on the board of the National Academy Foundation (NAF), the Peterson Center on Healthcare board of advisors, the Peterson Institute for International Economics and the RAND Health board of advisors. In 2013 he was elected to the American Academy of Arts and Sciences, an independent, multidisciplinary policy research center, and became a trustee of