Jack Hartung, Chipotle's former CFO and president, is set to join Tesla's board on June 1st.Hartung served as CFO of Chipotle for 22 years before becoming president last year.His appointment comes amidst scrutiny surrounding Tesla's board and reports of a search for a new CEO to replace Elon Musk.Hartung will also be a member of Tesla's board's audit committee, making him the ninth member of the board.