In practice , it serves as the NSC 's chief of staff responsible for coordination , budget and management of the National Security Council .
The Executive Secretary is the head of the NSC as defined by the National Security Act of 1947 .
In practice , NSC serves as the NSC 's chief of staff responsible for coordination , budget and management of the NSC     .
The Executive Secretary is the head of the NSC as defined by the National Security Act of 1947 .