David Spears Addington (born January 22, 1957) was legal counsel (2001–2005) and chief of staff (2005–2009) to Vice President Dick Cheney, and is now vice president of domestic and economic policy studies at The Heritage Foundation.During 21 years of federal service, Addington worked at the CIA, the Reagan White House, the Department of Defense, four congressional committees, and the Cheney Office of the Vice President. He was appointed to replace I. Lewis "Scooter" Libby Jr.