Leon Sigmund Fuerth was a former diplomat and national security adviser to Vice President Al Gore. He was succeeded by I. Lewis “Scooter” Libby in 2001.
Before his service to the future Vice President began, he also worked for the U.S. State Department. In the 1980’s he worked for Congressman Gore on issues such as arms control and stability. In 1985 Fuerth joined Gore’s senatorial staff where he also worked on national security questions.
When Gore became Vice President, he became his national security advisor. He is presently a Research Professor at the Elliott School of International Affairs of George Washington University in Washington, D.C. He continues to be active in the Democratic Party, and he has recently acted as a foreign policy advisor to Howard Dean.
Source - http://en.wikipedia.org/wiki/Leon_Fuerth