Dr. George G. Keener was a prominent Kingsport physician during the genesis of modern Kingsport and into the post-World War II era. Consistently active in Kingsport civic and political affairs, Dr. Keener served two terms on the Kingsport Board of Mayor and Aldermen, 1929-1931 and 1931-1933. As a member of the Board of Mayor and Aldermen, he actively supported public health reform efforts. During his tenure on the Board of Mayor and Alderman, Keener supported municipal reform efforts which were characteristic of the Progressive era in United States History. Keener was a physician in Knoxville and Jonesboro, Tennessee as well as Interior and Crandull, Virginia. Keener served as prison physician at Brushy Mountain State Prison at Petros, Tennessee beginning in 1911. He served as Kingsport Postmaster, 1909-1911.