Scott H. Stalker (born 1975) is a United States Marine Corps Master Gunnery Sergeant currently serving as the Command Senior Enlisted Leader (CSEL) of the United States Space Command. Before, he has been the Command Senior Enlisted Leader (CSEL) of the United States Cyber Command, the National Security Agency (NSA) and the Central Security Service (CSS) in Fort Meade, Maryland, serving from March 16, 2018, until August 28, 2020. He was the first to hold the position of CSEL for all three agencies during their career. He has served in multiple military operations throughout his career.