Mr Heitz joined the law firm Irell & Manella in 1972, serving as a partner from 1979 to 1988, before leaving to become vice president and general counsel and then acting president and CEO of Columbia Savings and Loan Association from 1988 to 1990.
Mr Edwards has been a board member since 1992, and chairman since 1996. He will remain on the El Paso Electric (EPE) board, and is the former president and CEO of Kansas City Southern Railway Company.
Frank Bates, interim president and CEO of EPE, said: The same superlative qualifications and ongoing dedication of both gentlemen that have supported this company’s growth and progress now afford us a seamless transition and continued vision and leadership at EPE.