Gil J. Van Lunsen was appointed to the audit committee on March 8, 2005. Van Lunsen was a managing partner of KPMG LLP and led the firm's Tulsa, Oklahoma, office before retiring in June 2000. During his career, Van Lunsen served clients in several industries including energy. He is currently a director and audit committee chairman of Array Biopharma and Sirenza Microdevices. Additionally, Van Lunsen was a member of the ethics compliance committee of Tyson Foods, Inc. and the audit committee chairman and member of the board of directors for Hillcrest Healthcare System.