CNGB meaning in Governmental ?

The chief of the National Guard Bureau (CNGB) is the highest-ranking officer of the National Guard and the head of the National Guard Bureau. The position is a statutory office (10 U.S.C. § 10502), held by a federally recognized commissioned officer who has served at least 10 years of federally recognized active duty in the National Guard; the Army National Guard or the Air National Guard. In a separate capacity as a member of the Joint Chiefs of Staff (10 U.S.C. § 151), the chief is a military adviser to the National Security Council, the Homeland Security Council, the secretary of defense, and the president on matters pertaining to the National Guard.

The chief is nominated for appointment by the president from any eligible National Guard officers holding the rank of major general or above, who also meets the requirements for the position as determined by defense secretary and the chairman of the Joint Chiefs of Staff, under the advice and/or recommendation from their respective state governors and their service secretary. The nominee must be confirmed via majority vote from the Senate. The Chief serves a four-year term of office at the pleasure of the President. By statute, the Chief is appointed as a four-star general in the Army or Air Force, serving as a reserve officer on active duty.