GlobalSantaFe Corporation announced that its board of directors has elected Jon A. Marshall as president and chief executive officer of the company. In addition, Mr. Marshall was elected a director at the company's annual meeting of shareholders. Mr. Marshall, who previously held the title of chief operating officer, succeeds C. Stedman "Sted" Garber, Jr., who, earlier this year, announced his intention to retire from his position as president, chief executive officer and a director. Marshall joined the company in 1979 and has held numerous operational and management roles over his 24-year career. In 1992, he became president of Applied Drilling Technology Inc. (ADTI), the company's turnkey drilling service subsidiary and Challenger Minerals Inc.