Aer Lingus chief financial officer and executive director Andrew Macfarlane is to leave the airline.
Macfarlane will "take up a new role in the Middle East outside the aviation industry", says the Irish flag carrier, which has started the process of recruiting a new finance chief. The incumbent will stay for up to six months to "facilitate the transition".
Having been appointed interim finance chief in December 2009, Macfarlane was formally appointed to the role, and that of executive director, in October 2010.
The airline's chief executive Christoph Mueller credits him with having "transformed Aer Lingus into a strong, profitable airline with a resilient business model and an improved cost base".