Walter Becker Slocombe (born September 23, 1941) is a former Under Secretary of Defense for Policy (1994–2001) and was the Senior Advisor for Security and Defence to the Coalition Provisional Authority in Baghdad (2003).
A lawyer and career federal official, Slocombe joined the staff of the National Security Council in 1969.
Prior to that, he worked as a law clerk for Supreme Court Justice Abe Fortas.
He is a four-time recipient of an award for Distinguished Public Service and a member of the Council on Foreign Relations.
He currently practices law with the Washington firm of Caplin & Drysdale.