In 2011 Moylan was appointed chairman of the London Legacy Development Corporation, a Mayoral body created by statute to own and manage the Olympic Park, heading it for the duration of the London Summer Olympics of 2012 and the Paralympic Games. He replaced the Labour peer Lady Ford, and was formally opposed by the Labour/Green majority on the London Assembly. He made significant changes to the leadership of the organisation, which were not welcomed by the longer-serving Board members. In September 2012, Johnson himself took over as chairman of LLDC, so that Moylan could focus on promoting their policy on a new London airport.