The chief executive of London City Airport is stepping down from his role.
Declan Collier, who was appointed in March 2012, will stay on in his position until a successor is found and will help the airport find its next chief executive.
Collier said as the airport embarks on the next phase of its development: "I feel it is the right time to transition to new leadership and I look forward to assisting the chairman to secure my successor and continuing to work with the leadership team until a new chief executive starts."
The airport is preparing for construction on its £350m development programme, due to be completed by the end of 2021.
It will enable the airport to welcome 6.5m passengers per year by 2025; last year it brought in 4.5m.
Last month it was announced Crossrail chair Sir Terry Morgan was joining London City as chairman, taking over from Roy Griffins.
Declan has been chief executive of London City Airport since March 2012 - a time that has seen significant growth at the airport, the successful sale of the business to a consortium of international investors and the securing of planning permission for a £350m development of the airport infrastructure.
The airport has delivered significant growth in passenger numbers and earnings which in turn has stimulated economic activity across the local and London economy.
London City was sold to a consortium of Canadian and Kuwaiti investors led by the Ontario Teachers' Pension Plan and Borealis Infrastructure, for around £2bn in February last year. The airport was courted by up a range of different groups of bidders after it was put on the market by Global Infrastructure Partners (GIP) in August 2015.