Mr. Duehring is the Principal Deputy Assistant Secretary of Defense for Reserve Affairs. He also performs the duties of acting Assistant Secretary of Defense for Reserve Affairs in the absence of the ASD/RA. He was selected effective July 23, 2001.

As the Principal Deputy, Mr. Duehring serves as the senior deputy to the Assistant Secretary of Defense for Reserve Affairs in policy development and overall supervision of the Reserve forces of the armed forces of the United States. He is the chief staff advisor to the assistant secretary for all functional areas and responsibilities assigned to the office.

Previously, Duehring served on the Bush-Cheney Transition Team and the Department of Defense Transition Team. He was the executive director of the Patrick Henry Center for Individual Liberty, a non-profit 501 (c)(3) educational and charitable foundation located in Fairfax, Virginia. Duehring was the endorsed Republican candidate for the Minnesota 2nd Congressional District in 1998. He is a 28-year military veteran, retiring as a colonel in the U.S. Air Force in February 1996. His final military assignment was as the U.S. Air Attaché to the Republic of Indonesia.

He is a decorated combat pilot, completing over 800 missions during the Vietnam War as a Forward Air Controller. Duehring has flown more than a dozen types of aircraft, amassing over 1,200 hours in the A-10 Thunderbolt II. His military awards and decorations include the Silver Star, the Defense Superior Service Medal, two Distinguished Flying Crosses, three Meritorious Service Medals, 27 Air Medals, two Air Force Commendation Medals, the Vietnamese Cross of Gallantry (individual award),and the Vietnamese Staff Service Honor Medal (1st Class). Duehring is also a recipient of the Air Force's highest individual award for leadership in the senior officer category, the Lance P. Sijan (SIGH-john) Award.

Duehring holds a bachelor of science in History and Sociology from Minnesota State University at Mankato, and a master of science in Counseling and Guidance from Troy State University.

He is a native of Mankato, Minnesota.