Raised in Tampa, Florida, Rear Admiral David Hahn graduated from the U.S. Naval Academy with distinction in 1985, earning a Bachelor of Science degree in Mechanical Engineering. Additionally, he holds a Master of Business Administration degree from George Mason University and has completed the Massachusetts Institute of Technology Seminar XXI program in International Security Affairs.
Prior to command, he served at sea aboard USS Casimir Pulaski (SSBN 633), USS William H. Bates (SSN 680) and USS Springfield (SSN 761), deploying to the North Atlantic and Western Pacific, as well as conducting several strategic deterrent patrols.
Ashore, he served as flag lieutenant to Superintendent, U.S. Naval Academy; squadron engineer, Submarine Development Squadron 12; action officer, Joint Staff in the Command, Control, Communications and Computers (C4) Directorate; and, legislative fellow on the staff of U.S. Senator John Warner.
Hahn commanded the USS Pittsburgh (SSN 720) from September 2003 to January 2007. In command, he deployed to the Caribbean Sea and Pacific Ocean, and conducted an Engineered Overhaul in Portsmouth, New Hampshire.
Since becoming an acquisition professional in 2007, he has served as Joint Test and Evaluation test director and program manager, Advanced Submarine Research and Development, and major program manager, Submarine Combat and Weapon Control Systems program. In November 2016, he assumed command of the Office of Naval Research as chief of naval research with concurrent flag responsibilities as director, Innovation Technology Requirements, and Test and Evaluation (OPNAV-N94).
Hahn has been awarded the Defense Superior Service Medal, Legion of Merit, Defense Meritorious Service Medal, the Meritorious Service Medal (three awards), the Navy and Marine Corps Commendation Medal (four awards), the Navy and Marine Corps Achievement Medal and various campaign and unit awards.