Henry Jacob Aaron (born 1936) is the Bruce and Virginia MacLaury Senior Fellow in the Economics program at the Brookings Institution, where he has been employed since 1968. He served as director of the program from 1990 through 1996. During 1996-1997 he was a Guggenheim Fellow at the Center for Advanced Study in the Behavioral Sciences at Stanford University. In 1997-1998 he was Assistant Secretary for Planning and Evaluation at the U.S. Department of Health, Education, and Welfare and the next year he chaired the Advisory Council on Social Security. On September 8, 2014 Aaron’s nomination by President Obama to be Chairman of the Social Security Advisory Board was confirmed by the Senate by a vote of 54-43.