Office of International Security Operations

U.S. Department of State, Harry S. Truman building, C Street Entrance Three U.S. Marines with weapons on a training exercise in 29 Palms, California The Pentagon

Mission

The Office of International Security Operations (ISO) is the primary interface between the Departments of State (DOS) and Defense (DoD) on operational matters.

ISO Director and Senior Military Representative to DOS, Col. David Lucia, USAF, heads the office. For more information, please call (202) 647-3136.