Dov S. Zakheim is an American businessman, writer, and former official of the United States government. In the Reagan administration, he held various Department of Defense positions. In 2000, Zakheim was a member of "The Vulcans", a group of foreign policy advisors assisting George W. Bush's presidential campaign. From 2001 to 2004 he was Under Secretary of Defense (Comptroller) and Chief Financial Officer of the Department of Defense.

The Vulcans is a nickname used to refer to Republican presidential candidate George W. Bush's foreign policy advisory team assembled to brief him prior to the 2000 US presidential election.