Tidewater Inc. (NYSE: TDW) announced the promotions of Nelson Greer, Mark Handin and Darren Vorst to Vice Presidents of Tidewater companies, effective April 1, 2011. Greer joined Tidewater in 1982, after completing 13 years in the British Merchant Marine. He completed the Harvard Business School General Management Program in 2006, and holds a Chief Engineer Unlimited Class 1 Engineering License. In his various management positions with Tidewater, he has been based in Angola, Nigeria, Congo and Gabon, prior to his current posting in Singapore. His Tidewater experience includes engineering, technical management, operations management, area management and, most recently, regional management, with responsibility for Southeast Asia, Australia, the Middle East, North Africa and India.