Originally from College Park, Maryland, Dennis Bevington served on active duty in the United States Navy from August 1970 until July 1979, and then again from May 1983 to August 2002. He attended and graduated from the United States Naval Academy in 1983 with a Bachelor's Degree in Naval Architecture. He received a Master's Degree in Electrical Engineering from the Naval Postgraduate School in 1989. While on active duty, he qualified in submarines, and served as a department head and Combat Systems Officer, as well as Navigation/Operations Officer on USS Hammerhead (SSN 663).
While still on active duty as an Engineering Duty Officer, he was assigned to NNSY as a Submarine Project Superintendent, where he became an expert in public shipyard operations and processes of maintenance, repair and testing requirements for nuclear powered submarines. Continuing on active duty, he was assigned to Commander in Chief, US Atlantic Fleet Forces from 1999 to 2002, as the Fleet Maintenance Readiness Officer. In this capacity, he served as principle advisor to the Fleet Maintenance Flag Officer for all issues involving ship's material conditions, and readiness. He was honorably discharged from the Navy in 2002 with a rank of Commander.
From 2003 to 2007, as a Project Superintendent at Norfolk Naval Shipyard (NNSY), he led the efforts on USS Georgia (SSGN 729) overhaul and refueling availability. A significant factor, concerning this availability was its requirement for a great deal of teaming between the public and private sector shipyards. This was a high visibility project that included a large amount of design-build, with cost and schedule performance depending greatly on the ability of the public shipyard to team with a major private shipyard.
From 2008 to 2011, he was the Project Superintendent of USS Tennessee (SSBN 734) $200 million overhaul at NNSY. This project was delivered under cost, and with the best quality and safety record in recent history at NNSY.
In 2011, he was selected to serve as the Executive Director of the Mid-Atlantic Regional Maintenance Center.