Dermot Mannion has been appointed as the new chief executive officer of Aer Lingus.
Mr Mannion, from Sligo, currently holds the position of president (group support services) with Dubai-based airline Emirates. He has worked with Emirates since 1987.
It is believed Mr Mannion will take up his post in August.
Former Aer Lingus CEO, Willie Walsh, who oversaw the turnaround of the airline, left in January along with his two senior executives, Mr Brian Dunne and Mr Séamus Kearney.
Fine Gael's Olivia Mitchell welcomed Mr Mannion's appointment. "I am pleased that there is finally someone back at the controls of Aer Lingus. Mr Mannion has excellent credentials and will need all his skills in order to tackle the many challenges facing Aer Lingus," she said.
"It is crucial that Mr Mannion is not left swinging in the wind by the Government, in the way which drove his predecessor to resign," she added.
Meanwhile, up to 200 people have missed their flights due to delays caused by tightened security at Dublin Airport Authority, according to Aer Lingus.
The new security measures were introduced over a week ago after an EU sanctioned audit of security found a number of major breaches.
During the audit, investigators managed to smuggle a fake bomb and knives into the airport.
The Airport Authority said it is training an extra 60 security staff over the next four weeks. The first 20 are expected to start working this Sunday.
A spokeswoman for the authority admitted that last Sunday was the most problematic day of the last week but said the situation had "improved dramatically" from Monday on.
Most of the delays happened at peak times at the airport, between 5:30am and 7:30am, with some delays of up to 28 minutes.
The authority is advising passengers to check in 90 minutes before departure time, to only carry one piece of hand luggage and to be aware of what they are carrying on board.