Sheldon R Erikson

Chairman of the Board of the Company since 1996. Age 66. He also has been Chief Executive Officer of the Company from 1995 to March 31, 2008 and President of the Company from 1995 to 2006. He was Chairman of the Board from 1988 to 1995, and President and Chief Executive Officer from 1987 to 1995, of The Western Company of North America, an international petroleum service company engaged in pressure pumping, well stimulating and cementing and offshore drilling. Previously, he was President of the Joy Petroleum Equipment Group of Joy Manufacturing Company. He is a director of Rockwood Holdings, Inc. He also serves on the boards of directors of the National Petroleum Council, the American Petroleum Institute, and the Petroleum Equipment Suppliers Association, of which he is a past Chairman of the Board.