Thomas's father was a career Navy officer. Thomas, and three of his brothers, are graduates of the United States Naval Academy. All are retired, including one who was in the Marine Corps. Another brother served in the Peace Corps. His two uncles also were Navy officers via Officers' Candidate School programs. Thomas graduated in 1981. Thomas was a 1976 graduate of Thomas Sprigg Wootton High School in Rockville, Maryland.
Navy career
In 1999, Thomas commanded the destroyer USS Ross. He has served aboard the USS Shreveport, USS Estocin, USS Willamette, and the USS Leyte Gulf
9-11 rescue efforts
Captain David Thomas was serving in the Pentagon on September 11, 2001, when al Qaedahijackers crashed a passenger jet into it, causing an explosion, fire, and consequent injuries and loss of life. Thomas was one of the people who spontaneously volunteered to enter the damaged part of the building to rescue survivors. When asked about his rescue efforts on September 11, Thomas replied: His fire-damaged uniform now hangs in the Smithsonian's American History gallery.
On May 27, 2008, Rear Admiral David Thomas replaced Rear Admiral Mark Buzby to become the 8th Commander of Joint Task Force Guantanamo, and the Guantanamo Bay detention camp. On April 2, 2009, Thomas defended inviting visiting VIP entertainers to view detainees at Guantanamo. Miss Universe 2008Dayana Mendoza and Miss USA 2008Crystle Stewart had both been invited to visit Guantanamo on a USO tour, where they signed autographs. Both women stirred controversy after they published accounts of their visits. Thomas had authorized the women to view captives. Carol Rosenberg, reporting in the Miami Herald, wrote that Thomas "brushed aside" concerns that by allowing civilians to view the captives he was violating the clause in the Geneva Conventions that protect captives from the humiliation of public display. Thomas asserted that the beauty queens had been allowed to view the detainees in Guantanamo just as if they were reporters.
After he left the Navy Thomas was hired as an executive at BAE, a firm which builds and maintains large vessels, including US Navy vessels. In 2018 he was put in charge of BAE's San Diego facility.