War Secretary Pete Hegseth fired Navy chief of staff Jon Harrison on Friday night, in what is the latest instance of a reshuffling at the Pentagon. “He [Harrison] will no longer serve as Chief of Staff to the Secretary of the Navy. Before his time as chief of staff, Harrison worked in the defense industry, specifically for Albers Aerospace. 2 NAVY POSTOn Wednesday, the Senate confirmed Hung Cao, a veteran who ran an unsuccessful Senate campaign in 2024, as undersecretary of the Navy. 2 post under Navy Secretary John Phelan.