HILL AIR FORCE BASE -- The commander of Utah's sole Air Force reserve unit will be stepping down.
Hill Air Force Base announced Wednesday that Col. Keith A. Knudson, commander of the base's 419th Fighter Wing, will retire after more than 27 years of Air Force service and more than 3,600 hours flying the F-16.
The fighter wing will host a change of command ceremony on Sunday, at which Col. Bryan P. Radliff will assume command of the nearly 1,200 personnel assigned to the wing.
Knudson became wing commander in December 2010.
He had previously served in the fighter wing's 466th Fighter Squadron from October 1992 to July 1994 as an F-16 instructor pilot.
While wing commander, Knudson said he strived to maintain the unit's worldwide mobility to perform a wide variety of F-16 operations and support missions.
Since 9/11, more than 2,000 reservists from the 419th have deployed in support of operations Iraqi Freedom and Enduring Freedom.
Before his assignment with the 419th, Knudson served as vice commander of the 301st Fighter Wing, Naval Air Station Fort Worth Joint Reserve Base, Texas.
He graduated from the U.S. Air Force Academy and was commissioned in 1985.
Knudson served on active duty for seven years before joining the Air Force Reserve in 1992.
Radliff comes from Joint Base Elmendorf-Richardson, Alaska, where he commanded the 477th Fighter Group.
He entered the Air Force in 1989 as a distinguished graduate of the Reserve Officer Training Corps, then served on active duty for 10 years. He also served in the Florida Air National Guard for three years before joining the Air Force Reserve in 2003.
He is a command pilot with more than 3,300 hours in F-22, F-15 and T-38 aircraft.
Kari Tilton, 419th Fighter Wing spokeswoman, said in his new assignment, Radliff will have to learn a new skill -- piloting the F-16.
"He's an experienced fighter pilot, so it won't be a huge transition," Tilton said. "But he will have to train to fly the F-16."