Cmdr. James R. Diefenderfer, Jr.

Commanding Officer, USS The Sullivans (DDG 68)

22 September 2021

Cmdr. James R. Diefenderfer, Jr.
Cmdr. James R. Diefenderfer, Jr.
Cmdr. James R. Diefenderfer, Jr.
Cmdr. James R. Diefenderfer, Jr.
Cmdr. James R. Diefenderfer, Jr.
Photo By: MC2 Jacob Milham
VIRIN: 210922-N-OW182-0001

Commander Diefenderfer is a native of Bear, Delaware. A 2003 graduate of the United States Naval Academy, Commander Diefenderfer 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, Commander 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, USS Carl Vinson (CVN 70) as Reactor Training Assistant and most recently in USS THE SULLIVANS (DDG 68) as Executive Officer.
Ashore, he served as Shift Engineer at the Nuclear Power Training Unit, Ballston Spa, NY at the S8G/AFR Prototype, on the Navy Staff in the Navy Warfare Group (OPNAV N515), and on the U.S. Northern Command Staff as a Missile Defense Officer and as Aide-de-Camp to the Commander.
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.

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