 After leaving the U.S. House, Thompson returned to his law firm in Atlanta.In 1985, he was made a member of the Atlanta Regional Commission.From 2009 until 2011, Thompson served as the Commander of the Atlanta World War II Roundtable, an organization that was created in 1986 "to hear and record the war experiences of World War II and to pass on to posterity the knowledge of World War II and the price – human and material – that was paid by our nation for the preservation of freedom in the United States and the world".