Keith Archibald Smith, OBE, AM, MIE Aust, FCIT, (4 May 1915 – 16 July 2011) was Chief Mechanical Engineer, and later Commissioner, for the Commonwealth Railways of Australia, which operates mostly in remote and desolate areas railways for the Federal Government. Under his stewardship, 1,000 km of new railway to Alice Springs were built, completed in 1980 and 1,420 km of further extension to Darwin were surveyed. He was made an Officer of the Order of the British Empire in 1970. He died at Victor Harbor, South Australia, on 16 July 2011, aged 96.