 On 21 June 2010 the combination of Acergy S.A. and Subsea 7 Inc. was announced and was completed on 7 January 2011.The new entity took the Subsea 7 name while retaining Acergy's Luxembourg domicile and operational headquarters in London.The chairman and chief executive roles were filled by Kristian Siem and Jean Cahuzac, who had previously held the same roles at Subsea 7 and Acergy respectively.