The chief master sergeant of the Space Force (acronym: CMSSF) is the senior enlisted advisor to the chief of space operations and the secretary of the Air Force. The chief master sergeant of the Space Force is the most senior enlisted guardian in the U.S. Space Force, unless an enlisted guardian is serving as the Senior Enlisted Advisor to the Chairman.. The current chief master sergeant of the Space Force is Roger A. Towberman, who assumed the office on 3 April 2020.