EXHIBIT 99.1





Acergy S.A. Extraordinary
 General Meeting of Shareholders
 
 London, England – December 20, 2010– Acergy S.A. (NASDAQ-GS: ACGY; Oslo Stock Exchange: ACY) advises that at the Extraordinary General Meeting of Shareholders (the “Meeting”) on December 20, 2010 the sole agenda item, to appoint Mr. Bob Long as the ninth Director of the Board of Subsea 7 S.A., was approved by over 99% of the votes cast.
 
 Completion of the proposed combination of Acergy S.A. and Subsea 7 Inc. is expected to occur in January 2011, subject to customary closing conditions.
 
 The minutes of the Meeting detailing the resolution proposed and the result of the poll on resolution is attached hereto.
 
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 Acergy S.A. is a seabed-to-surface engineering and construction contractor to the offshore oil and gas industry worldwide.   We provide integrated services, and we plan, design and deliver complex projects in harsh and challenging environments.
 
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 Contact:
 Karen Menzel
 Acergy S.A.
 +44 (0)20 8210 5568
 karen.menzel@acergy-group.com
 www.acergy-group.com
 
 If you no longer wish to receive our press releases please contact: karen.menzel@acergy-group.com
 
 Forward-Looking Statements: Certain statements made in this announcement may include “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the US Securities Exchange Act of 1934.  These statements may be identified by the use of words like “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “plan,” “forecast,” “project,” “will,” “should,” “seek,” and similar expressions.  These forward-looking statements include, but are not limited to, statements as to anticipated date of completion.  The forward-looking statements reflect our current views and assumptions and are subject to risks and uncertainties.  The following factors, and others which are discussed in our public filings and submissions with the U.S. Securities and Exchange Commission, are among those that may cause actual and future results and trends to differ materially from our forward-looking statements: actions by regulatory authorities or other third parties; unanticipated costs and difficulties related to the integration of Acergy S.A. and Subsea 7 Inc. and our ability to achieve benefits therefrom; unanticipated delays, costs and difficulties related to the combination transaction, including satisfaction of closing conditions; our ability to recover costs on significant projects; the general economic conditions and competition in the markets and businesses in which we operate; our relationship with significant clients; the outcome of legal proceedings or governmental enquiries; uncertainties inherent in operating internationally; the timely delivery of ships on order and the timely completion of ship conversion programmes; the impact of laws and regulations; and operating hazards, including spills and environmental damage.  Many of these factors are beyond our ability to control or predict.  Given these factors, you should not place undue reliance on the forward-looking statements.
 
 This communication does not constitute an offer to purchase, sell, or exchange or the solicitation of an offer to sell, purchase, or exchange any securities of Subsea 7 or Acergy.