Rear Adm. (select) Creevy is a native of Bridgeport, Conn. After graduating from Loomis Chaffee Prep School in 1980, he attended the U.S. Naval Academy, earning a bachelor’s degree in Political Science and was commissioned in 1984. In 1991, he completed his master's degree in Information Systems Management at George Washington University. Creevy was selected for promotion to the rank of rear admiral in May 2011.

Creevy assumed command of the Naval Surface Warfare Center (NSWC) in November 2012. The NSWC command includes 10 NSWC division commands manned with active duty personnel and civilian scientists, engineers and support personnel across the United States. NSWC provides research, development, test and evaluation, and engineering support for ship systems; hull, mechanical and electrical systems; and, surface ship combat and weapons systems.

His career as a surface warfare officer includes assignments as both commanding officer and executive officer of USS Portland (LSD 37); chief engineer aboard USS Anchorage (LSD 36) and damage control assistant aboard USS Kiska (AE 35).

Creevy's major command and staff assignments include: U.S. Fleet Forces Command Fleet maintenance officer (most recently); executive assistant to Commander, Naval Sea Systems Command; and, a major acquisition command tour as Major program manager for the Above Water Sensors Directorate (PEO IWS 2.0).

He has served ashore in a variety of acquisition program management positions including: deputy program manager for the Integrated Combat Systems Directorate (PEO Integrated Warfare Systems (IWS) 1.0); Amphibious Ship Integration program manager (PEO IWS 1.0); In-Service Radar chief engineer for the Above Water Sensors Directorate (PEO IWS 2.0), Platform Integration manager for the Performance Monitoring, Training and Assessment Program Office (PEO Expeditionary Warfare), and Tomahawk Weapon Control System Advanced Systems engineer (PEO Cruise Missiles and Unmanned Aerial Vehicles).

Creevy is a recipient of various awards including the Legion of Merit, Meritorious Service Medal, Navy and Marine Corps Commendation Medal, Army Commendation Medal, Navy and Marine Corps Achievement Medal, as well as the Battle "E" and other campaign and sea service awards.