Oman has awarded Hill International, Inc. a two year contract worth OMR 41.8 million ($108.5 million) to supervise the expansion of Muscat's international airport. Hill International will replace Danish consulting group COWI after the ministry of transport opted not to renew a contract signed in 2008 to supervise the project. Oman is expanding the airport's terminal building and the airfield in a project that has been dogged by delays.

Initially, the sultanate planned to complete the expansion, worth $7 billion, by the end of 2012, but has revised its completion date to late 2014. Hill International's contract starts on January 1, 2013.