Irish flag-carrier Aer Lingus' chief financial officer Sean Coyle has resigned from his post and will leave the company at the end of this month.
Coyle, who joined the airline from Ryanair only 16 months ago, is also the head of short-haul operations.
He is leaving Aer Lingus "by mutual agreement", says the carrier, to "pursue other interests". Coyle will also step down from the board.
Aer Lingus has yet to name a successor.
Coyle's resignation comes as the airline battles to push through a restructuring plan to slash costs at the loss-making company.
Aer Lingus chairman Colm Barrington says that Coyle has made a "significant contribution" to the carrier "particularly within the context" of its restructuring.