GlobalSantaFe Corp. MarshallClick here to enlarge imageHouston, has elected Jon A. Marshall as president and chief executive officer, and a director of the company.Marshall joined the company in 1979, and has held numerous operational and management roles. He earned his engineering degree from the US Military Academy at West Point.GlobalSantaFe Corp. is a leading worldwide oil and gas drilling contractor, offering a full range of premium equipment and drilling management services.Knowledge Systems Inc.Houston, has announced the appointment of Gemma Keaney as geomechanics solutions manager, and Shane Knutsvig as sales manager.Keany received her PhD from University College of London. She m...

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