| Name | Tenure | SecDef(s) Served Under | President(s) Served Under |
|---|
| John E.
Krings | April 18, 1985 - June 30, 1989 | Caspar W. Weinberger Frank C. Carlucci III William H. Taft IV (Acting) Richard B. Cheney | Ronald Reagan George H. W. Bush |
| Robert C. Duncan | November 22, 1989 - January 20, 1993 | Richard B.
Cheney | George H. W. Bush |
| Lee Frame (Acting) | January 21, 1993 - September 30, 1994 | Leslie Aspin, Jr. William J. Perry | William Clinton |
| Philip E. Coyle III | October 3, 1994 - January 19, 2001 | William J.
Perry William S. Cohen | William Clinton |
| Thomas P. Christie | July 17, 2001 - January 31, 2005 | Donald H. Rumsfeld | George W. Bush |
| David W. Duma (Acting) | February 1, 2005 - July 26, 2006 | Donald H.
Rumsfeld | George W. Bush |
| Dr. Charles E. McQueary | July 27, 2006 - May 31, 2009 | Donald H. Rumsfeld Robert M. Gates | George W. Bush Barack Obama |
| David W.
Duma (Acting) | June 1, 2009 - September 22, 2009 | Ro
|