McArdle will direct Apache's worldwide crude oil and natural gas marketing activities. Prior to joining Apache, she served as managing director for Aquila Europe Ltd. McArdle held executive and management positions with Aquila Energy Marketing from 1993 to 2002, including vice president - trading, and vice president - mergers and acquisitions. She was a partner in Hesse Gas from 1991 to 1993. From 1983 to 1991, she held various positions of increasing responsibility in engineering, gas supply and marketing at Enron Corp. McArdle was a member of the board of directors of Intercontinental Exchange, the electronic trading platform, from 2000 to October 2002. She holds a bachelor's degree in chemical engineering from the University of Nebraska and an M.B.A. from the University of Houston. NOTE TO EDITORS: For photos of Ms. McArdle and Mr. Benson, please contact Bill Mintz at the number below or at bill.mintz@apachecorp.com.