http://en.wikipedia.org/wiki/Mark_McClellanIn Government
During 2001 and 2002, McClellan served in the White House. He was a Member of the President's Council of Economic Advisers, where he advised on domestic economic issues. He also served during this time as a senior policy director for health care and related economic issues for the White House.
McClellan served as Commissioner for the Food and Drug Administration (FDA) beginning November 14, 2002, becoming the first economist to hold that position.<1> Originally from Austin, Texas, he is the brother of former White House Press Secretary Scott McClellan and the son of Texas comptroller Carole Keeton Strayhorn and attorney Barr McClellan.
He was Administrator for the Centers for Medicare and Medicaid Services in the United States Department of Health and Human Services from 2004 to 2006. In this position, he was responsible for administering the Medicare and Medicaid programs, including Medicare Part D, the prescription drug benefit program engendered by the Medicare Prescription Drug, Improvement, and Modernization Act.
Following the resignation of Health & Human Services Secretary Tommy Thompson in 2004, McClellan was mentioned as a possible replacement, but President Bush ultimately nominated former Utah governor Mike Leavitt. On September 5, 2006, McClellan announced his resignation from the post. He told The Associated Press he would be leaving the agency in about five weeks and would probably work for a think tank where he could write about improving health care in the United States.