Image |
Name |
Tenure |
SecDef(s) served under |
President(s) served under |
| H. Struve Hensel | August 17, 1953 – March 4, 1954 | Charles Erwin Wilson | Dwight Eisenhower |
| Wilber M. Brucker | April 23, 1954 – July 20, 1955 |
| Mansfield D. Sprague | October 6, 1955 – February 27, 1957 |
| Robert Dechert | February 28, 1957 – July 15, 1959 | Charles Erwin Wilson Neil H. McElroy |
| J. Vincent Burke Jr. | September 14, 1959 – January 20, 1961 | Neil H. McElroy Thomas S. Gates |
| Cyrus Vance | January 29, 1961 – June 30, 1962 | Robert S. McNamara | John F. Kennedy |
| John McNaughton | July 5, 1962 – June 25, 1964 | John F. Kennedy Lyndon B. Johnson |
| Leonard Niederlehner (Acting) | July 1, 1964 – September 19, 1966 | Lyndon B. Johnson |
| Paul Warnke | October 3, 1966 – July 31, 1967 |
| Leonard Niederlehner (Acting) | August 1, 1967 – August 20, 1970 | Robert S. McNamara Clark Clifford Melvin Laird | Lyndon B. Johnson Richard Nixon |
| J. Fred Buzhardt | August 20, 1970 – January 4, 1974 | Melvin Laird Elliot Richardson James R. Schlesinger | Richard Nixon |
| Leonard Niederlehner (Acting) | May 22, 1973 – March 13, 1974 | James R. Schlesinger |
| Martin Richard Hoffmann | March 14, 1974 – August 5, 1975 | Richard Nixon Gerald Ford |
| Leonard Niederlehner (Acting) | August 6, 1975 – January 1, 1976 | James R. Schlesinger Donald Rumsfeld | Gerald Ford |
| Richard A. Wiley | January 2, 1976 – January 15, 1977 | Donald Rumsfeld |
| Deanne C. Siemer | April 28, 1977 – October 15, 1979 | Harold Brown | Jimmy Carter |
| Leonard Niederlehner (Acting) | October 15, 1979 – February 1, 1980 |
| Togo D. West Jr. | February 1, 1980 – January 20, 1981 |
| Leonard Niederlehner (Acting) | January 20, 1981 – April 1, 1981 | Caspar Weinberger | Ronald Reagan |
| William Howard Taft IV | April 2, 1981 – May 2, 1984 |
| Chapman B. Cox | May 3, 1984 – December 16, 1985 |
| Henry L. Garrett III | February 5, 1986 – August 6, 1987 |
| Leonard Niederlehner (Acting) | August 7, 1987 – October 25, 1987 |
| Kathleen A. Buck | October 26, 1987 – December 30, 1989 | Caspar Weinberger Frank Carlucci William Howard Taft IV Dick Cheney | Ronald Reagan George H. W. Bush |
| Terrence O'Donnell | October 30, 1989 – March 6, 1992 | Dick Cheney | George H. W. Bush |
| C. Paul Beach Jr. (Acting) | March 7, 1992 – August 11, 1992 |
| David Addington | August 12, 1992 – January 20, 1993 |
| John H. McNeil (Acting) | January 20, 1993 – May 5, 1993 | Les Aspin | Bill Clinton |
| Jamie Gorelick | May 5, 1993 – March 17, 1994 | Lee Aspin William Perry |
| Stephen W. Preston (Acting) | March 28, 1994 – September 28, 1994 | William Perry |
| Judith A. Miller | September 29, 1994 – November 7, 1999 | William Perry William Cohen |
| Douglas A. Dworkin | November 7, 1999 – June 14, 2000 (Acting) June 14, 2000 – January 19, 2001 | William Cohen |
| William J. Haynes II | May 24, 2001 – February 26, 2008[4] | Donald Rumsfeld Robert Gates | George W. Bush |
| Jeh Johnson | February 10, 2009 – December 31, 2012 | Robert Gates Leon Panetta | Barack Obama |
| Robert S. Taylor (Acting)[5] | January 1, 2013 – October 25, 2013 | Leon Panetta Chuck Hagel |
| Stephen W. Preston | October 25, 2013–June 2015 | Chuck Hagel Ashton Carter |
|
Robert S. Taylor (Acting)[5] |
June 2015 - June 14, 2016 |
Ashton Carter |
| Jennifer M. O'Connor | June 14, 2016–January, 20 2017 | Ashton Carter |
| William S. Castle (Acting) | August 2017 – July 2018 | James Mattis |
Donald Trump |
| Paul C. Ney Jr. | August 20, 2018 – January 20, 2021 | James Mattis Mark Esper Christopher C. Miller (acting) |
| Beth George (Acting) | January 20, 2021 – August 2, 2021 | David Norquist (acting) Lloyd Austin | Joe Biden |
| Caroline Krass | August 2, 2021 – present | Lloyd Austin |