Horizon Offshore, Inc. announced the board of directors has elected J. Louis Frank as chairman of the board of the Houston-based marine construction company. Replacing outgoing chairman, James Devine, a UK national, with Frank, a U.S. citizen, allows Horizon to meet certain U.S. regulatory requirements relevant to a recently awarded contract. Mr. Devine remains a member of the board of directors. J. Louis "Corky" Frank joined the board of directors at Horizon in July 2001. Frank has extensive oil and gas and management experience, having held numerous positions of responsibility over 43 years with Marathon Oil Company, including service as president of Marathon Ashland Petroleum. He retired from Marathon in 2001.