Exhibit 9.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statements of
Acergy S.A. (a Luxembourg company) and its subsidiaries (the "Company") File
Nos. 33-85168, 333-09292, 333-74321, 333-124983 and 333-124997 on Form S-8 and
File No. 333-86288 on Form F-3 and Form F-3/A of our report dated February 18,
2009 relating to the financial statements of the Company, appearing in this
Annual Report on Form 20-F/A of the Company for the year ended November 30,
2008.



/s/ Deloitte LLP
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DELOITTE LLP


London, United Kingdom
April 23, 2009