Prota has taken the consultancy services for the construction supervision of İstanbul Sabiha Gökçen International Terminal.

As of 1 May 2008, the right of operation of the airport has been transferred to Istanbul Sabiha Gökçen Uluslar arası Havalimanı Yatırım, Yapım ve İşletme A.Ş. for 20 years. Operaton  Company is established by Limak Holding (Limak), GMR Infrastructure Ltd. (GMR) and Malaysia Airports Holding Berhad (MAHB) Joint Venture. New international terminal which has 320,000 m2 of construction area, a new carpark having a capacity of 4300 cars and the annexes are planned to commence servicing on 29 October 2009.