The Director of the Joint Staff (DJS) is a three-star officer who assists the Chairman of the Joint Chiefs of Staff with the management of the Joint Staff, an organization composed of approximately equal numbers of officers contributed by the Army, Marine Corps, Navy, Air Force, and National Guard Bureau who have been assigned to assist the Chairman with the unified strategic direction, operation, and integration of the combatant land, naval, and air forces. The Director also chairs meetings of the Operations Deputies, a subsidiary body comprising the Director and a three-star delegate from each service who preview or resolve issues before they are escalated to the level of the four-star Joint Chiefs of Staff.