Director, Operational Test and Evaluation
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 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 Robert M. Gates Barack Obama
Dr. J. Michael Gilmore September 23 , 2009 - January 19 , 2017 Robert M. Gates Leon Panetta Chuck Hagel Ash Carter Barack Obama
David W. Duma ( Acting ) January 20 , 2017 - December 11 , 2017 James Mattis Donald Trump
Robert Behler December 11 , 2017 - Present James Mattis Patrick Shanahan ( Acting ) Mark Esper Donald Trump
Directors
The Director, Operational Test and Evaluation (DOT&E) is the principal staff assistant and adviser to the US Secretary of Defense on operational and live fire test and evaluation (OT&E) activities involving U.S. Department of Defense (DOD) weapons systems.