A newly created position, the SEAC was established to advise the Chairman on matters of professional development of enlisted personnel for a joint environment. Sergeant Major William J. Gainey, United States Army, is the first person selected to serve in this position, beginning October 1, 2005. | A newly created position, the SEAC was established to advise the Chairman on matters of professional development of enlisted personnel for a joint environment. Sergeant Major William J. Gainey, United States Army, is the first person selected to serve in this position, beginning October 1, 2005. |