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Transocean Ltd. Announces David A. Tonnel Named Senior Vice President, Europe and Africa Unit

June 18, 2009

ZUG, Switzerland, June 18, 2009 (GLOBE NEWSWIRE) -- Transocean Ltd. (NYSE:RIG) today announced that David A. Tonnel has been named Senior Vice President, Europe and Africa Unit (EAU), reporting to Rob Saltiel, Executive Vice President, Performance, effective September 1, 2009. Mr. Tonnel will be based in Paris and will succeed Ricardo H. Rosa, the current Senior Vice President, EAU, who will become Senior Vice President and Chief Financial Officer, effective September 1, 2009.

Mr. Tonnel currently serves as the company's Interim Vice President of Global Supply Chain, a position he has held since November 2008. Previously, Mr. Tonnel served in financial and other roles over his 13 years with the company in several locations, including West Africa, Southeast Asia, Europe and the United States. These roles included Vice President of Integration for the Transocean and GlobalSantaFe merger, Vice President and Controller, Assistant Controller, and regional Finance Manager.

Mr. Tonnel graduated in 1991 from ecole des Hautes Etudes Commerciales (H.E.C) in Paris, France, with a Master of Science degree in Management.

Transocean Ltd. is the world's largest offshore drilling contractor and the leading provider of drilling management services worldwide. With a fleet of 135 mobile offshore drilling units plus 10 announced ultra-deepwater newbuild units, the company's fleet is considered one of the most modern and versatile in the world due to its emphasis on technically demanding segments of the offshore drilling business. The company owns or operates a contract drilling fleet of 39 High-Specification Floaters (Ultra-Deepwater, Deepwater and Harsh-Environment semisubmersibles and drillships), 28 Midwater Floaters, 10 High-Specification Jackups, 55 Standard Jackups and other assets utilized in the support of offshore drilling activities worldwide.

The Transocean Ltd. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=2252

CONTACT: Transocean Ltd.
Analyst Contact:
Gregory S. Panagos
713-232-7551
Media Contact:
Guy A. Cantwell
713-232-7647