Esfandiar Rahim Mashaei is an Iranian conservative politician and former intelligence officer. As a senior Cabinet member in the administration of President Mahmoud Ahmadinejad, he served as Chief of Staff from 2009 to 2013, and served as the fourth first vice president of Iran for one week in 2009 until his resignation was ordered by Supreme Leader Ayatollah Ali Khamenei.

The Cabinet of Iran is a formal body composed of government officials, ministers, chosen and led by a President. Its composition must be approved by a vote in the Parliament. According to the Constitution of the Islamic Republic of Iran, the President may dismiss members of the cabinet, but must do so in writing, and new appointees must again be approved by the Parliament. The cabinet meets weekly on Saturdays in Tehran. There may be additional meetings if circumstances require it. The president chairs the meetings. The Supreme Leader has the power to dismiss cabinet members like ministers and vice presidents, as well as the President, at any time, regardless of the Parliament's decisions.