David John Lesar (born May 30, 1953) is an American businessman who is the former Chairman of Halliburton Energy Services. He was the CEO of Halliburton for 17 years from 2000 to 2017. Trained as a Certified Public Accountant, Lesar spent 16 years at Arthur Andersen. He had spent most of his career at Andersen, where he worked on their Halliburton account. In 1995, Lesar was hired by Halliburton as a new vice president. July 24, 2019 David Lesar was named the interim CEO of HCSC. ...more on Wikipedia