Ensco plc (NYSE: ESV) announced today that Chairman, President and CEO Dan Rabun has decided to retire after nearly eight years of service. Mr. Rabun will continue to serve in his current role as Chairman, President and CEO until the Board of Directors has completed the succession process and a new CEO has been appointed. To assist with the new CEO’s transition, Mr. Rabun will remain Chairman through at least the 2014 Annual General Meeting. Mr. Rabun’s planned retirement from the CEO role has been part of the Board’s succession planning process for more than a year. A special committee chaired by Paul Rowsey, the Board’s Lead Director, is directing the succession process. This committee has been working with Heidrick & Struggles International Inc., a leading executive recruiting firm, and is considering both external and internal candidates. “Dan has made many contributions to the success of our Company - especially his unwavering passion to further advance safety and operational excellence,” said Mr. Rowsey. “Over the past eight years revenue and stockholders’ equity have more than quadrupled, dividends have grown from $0.10 to $3.00 per share annually and we are now among the largest and most well-respected offshore drillers.” Mr. Rowsey concluded, “We are grateful that Dan will facilitate a smooth transition as we complete the succession process.” Mr. Rabun commented, “I have truly enjoyed leading Ensco over the past eight years. We have a highly-talented management team and exceptionally dedicated employees who have made our many achievements possible. In particular, I am especially proud that we have taken our safety performance to an even higher level. Our new CEO will benefit, as I have, from our employees’ commitment to go beyond expectations in everything they do.” Statements contained in this press release that are not historical facts are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements include words or phrases such as “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan,” “project,” “could,” “may,” “might,” “should,” “will” and similar words and specifically include statements regarding Mr. Rabun’s transition period and intention to serve as Chairman, succession planning, the executive search and a new CEO. Such statements are subject to numerous risks, uncertainties and assumptions that may cause actual results to vary materially from those indicated. In addition to the factors described above, you should also carefully read and consider “Item 1A. Risk Factors” in Part I and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II of our most recent annual report on Form 10-K, which is available on the SEC’s website at www.sec.gov or on the Investor Relations section of our website at www.enscoplc.com . Each forward-looking statement speaks only as of the date of the particular statement, and we undertake no obligation to publicly update or revise any forward looking statements, except as required by law. Ensco plc (NYSE: ESV) brings energy to the world as a global provider of offshore drilling services to the petroleum industry. For more than 25 years, the company has focused on operating safely and exceeding customer expectations. Ensco is ranked #1 for total customer satisfaction with top honors in 10 of 16 categories in the most recent annual survey by EnergyPoint Research. Operating the world’s newest ultra-deepwater fleet and largest fleet of active premium jackups, Ensco has a major presence in the most strategic offshore basins across six continents. Ensco plc is an English limited company (England No. 7023598) with its registered office and corporate headquarters located at 6 Chesterfield Gardens, London W1J 5BQ. To learn more, visit our website at www.enscoplc.com.