Gregory J. Slavonic is an American government official and retired U.S. Navy officer. He served as Acting Under Secretary of the Navy from April 24, 2020 to January 20, 2021. He previously served as the 18th Assistant Secretary of the Navy for Manpower and Reserve Affairs.
Secretary Slavonic served as the deputy and principal assistant to the Secretary of the Navy, as well as Chief Operating Officer and Chief Management Officer for the Department of the Navy. Additionally, he oversaw intelligence activities, intelligence-related activities, special access programs, critical infrastructure, and sensitive activities within the Department.
As the Assistant Secretary for Manpower and Reserve Affairs, Slavonic was responsible for the overall supervision and oversight of manpower and reserve component affairs of the Department of the Navy. Prior to joining the Department, he had served as Chief of Staff for U.S. Senator James Lankford (R-OK) and was Lankford’s last chief while he was a member of the U.S. House of Representatives.
Secretary Slavonic retired from the U.S Navy/Navy Reserve after a 34-year career that began with enlisting as a Seaman Recruit and concluded a distinguished career attaining the rank of Rear Admiral. During his Navy career, he held four command assignments, served in combat deployments to Vietnam, Operations Desert Shield/Desert Storm, and Operation Iraqi Freedom. His final assignment was as the Navy’s Sixth Special Assistant to Chief of Information (CHINFO) and Director of Public Affairs Program (Reserve). The Secretary also served as the co-chair for the design and building of the USS Oklahoma Memorial at Pearl Harbor to remember the 429 Sailors and Marines who served aboard the battleship and lost their lives on December 7, 1941.