Operations (J3)

The Operations directorate is the Continental [Staff System] branch of the U.S. DOD Joint Staff responsible for military operations.
It is the third level of the US National Level Command Structure, primarily assists the Chairman of the [Joint Chiefs of Staff] in carrying out responsibilities as the principal military advisor to the President and Secretary of Defense. Operations develops and provides guidance to the Combatant Commanders; relays communications between the President, Secretary of Defense, Combatant Commanders regarding current operations and plans.
It is headed by the Director, Operations, staff code J3, a three-star lieutenant general or vice admiral.
The National [Military Command Center] is part of the J3 directorate.