Isaac Ready (1963–1970) Ben E. Fountain, Jr. (1971–1978) Larry J. Blake (1979–1982) Robert W. Scott (1983–1995) Lloyd V. Hackley (1995–1997) Martin Lancaster (1997–2008) Scott Ralls (2008–2015)[5] Jimmie Williamson (2016–2017)[6][7] Peter Hans (2018–2020)[8] Thomas Stith III (Jan. 11, 2021–present)[9]