Each of the phases of the South Pars project is estimated to have an average capital spend of around US$1.5bn, and most will be led by foreign oil firms working in partnership with local companies. The government of President Ahmadinejad, who came to power in 2005, has favoured local firms over foreign companies in the energy and other sectors. In 2010, Iran awarded $21 billion of contracts to local companies to develop six stages (phases 13, 14, 19, 22, 23 and 24) of the South Pars gas field. Khatam al-Anbiya Construction Headquarters, the engineering arm of the Revolutionary Guard Corps, is part of the domestic group, as is Oil Industries Engineering and Construction and Iran Marine Industrial Co. The group also includes Iran Shipbuilding and Offshore Industries Complex Co., Industrial Development and Renovation Organization of Iran, and National Iranian Drilling Co. Managing the projects by Iranian companies does not rule out the participation of foreign firms in South Pars projects.