Cmdr. Diefenderfer is a native of Bear, Delaware. Diefenderfer is a 2003 graduate of the United States Naval Academy, where he earned a Bachelor of Science degree in Electrical Engineering. In 2011, he completed a Master of Science in Engineering Management from Old Dominion University.
A career surface warfare officer, Diefenderfer’s shipboard assignments include: USS Chosin (CG 65) as First Lieutenant, USS John C. Stennis (CVN 74) as Reactor Mechanical Division Officer, USS Chung-Hoon (DDG 93) as Operations Officer, and USS Carl Vinson (CVN 70) as Reactor Training Assistant.
Ashore, he served as Shift Engineer at the Nuclear Power Training Unit, Ballston Spa, New York, at the S8G/AFR Prototype and on the Navy Staff as an Action Officer in the Navy Warfare Group (OPNAV N515). Most recently he served aboard the U.S. Northern Command Staff as a Missile Defense Officer and as Aide-de-Camp to the Commander.
Diefenderfer is the recipient of the 2015 Admiral Award for Leadership from the Stennis Center. His personal decorations include the Defense Meritorious Service Medal, Navy and Marine Corps Commendation Medal (5), Navy and Marine Corps Achievement Medal, and various unit, campaign, and service awards.