Transocean Names John Stobart COO

Transocean Ltd.

today announced that effective October 1, 2012, Ihab Toma has been named Executive Vice President, Chief of Staff. In addition to continuing to oversee the company's worldwide marketing effort, Mr. Toma will assume responsibility for Human Resources, Global Supply Chain, and Information Technology. He will also provide strategic direction and help coordinate the implementation of the company's vision and strategy across the organization. Mr. Toma will continue to report to Steven L. Newman, President and Chief Executive Officer. Additionally, John Stobart has been named Executive Vice President and Chief Operating Officer, effective October 1, 2012. Mr. Stobart will also report to Mr. Newman. Before joining the Company, Mr. Stobart served as Worldwide Drilling Manager for BHP Billiton Petroleum since 1994 in Australia, the United Kingdom and, most recently, in Houston, Texas. Prior to that role, he served in various positions with BHP Billiton beginning in 1988, including Manager Drilling for the Australia Division, Drilling Superintendent, Senior Drilling Supervisor, Senior Engineering Associate and Senior Drilling Engineer. Before BHP Billiton, Mr. Stobart served in various engineering capacities with Husky Oil from 1984 to 1988 and Dome Petroleum Limited from 1979 to 1984. He started his career with Vibrox Exploration Ltd. in 1976. Mr. Stobart received his Bachelor's degree in Mechanical Engineering from the University of Calgary and has also completed the London Business School Accelerated Development Program.