Darrell Hollek, who joined Anadarko Petroleum Corp. as a field engineer in 1980, has been promoted from executive vice president (EVP) of U.S. onshore exploration and production to EVP of operations with responsibility for domestic, exploration, production and midstream activities, as well as Gulf of Mexico and international business. Ernie Leyendecker, formerly senior vice president of international exploration who joined Anadarko in 2002, has been named EVP of international and deepwater exploration. EVP Bob Daniels, who has run international and deepwater exploration, is to continue and remain a member of the executive committee until his retirement later this year. EVP Jim Kleckner, who has been running international and deepwater operations, also is retiring.