Sir Leslie Charles Thiess CBE (8 April 1909 – 25 November 1992) was a construction and mining industries entrepreneur, based in Queensland, Australia.In 1968 he was appointed a Commander of the Order of the British Empire (CBE).
In 1971 he was knighted.He allegedly delivered a hangar to the property of Queensland premier Sir Joh Bjelke-Petersen, and did private civil engineering works for him that were written off as "Queensland Government Projects".
In 1999 he received the Distinguished Constructor Award from the Queensland University of Technology.