Politics of Oman takes place in a framework of an absolute monarchy whereby the Sultan of Oman is not only head of state, but also the head of government. Chief of state and government is the hereditary sultan, Qaboos bin Said al Said, who appoints a cabinet to assist him. Sultan Qaboos also serves has supreme commander of the armed forces, prime minister, and minister of defense, foreign affairs, and finance.

Source: https://en.wikipedia.org/wiki/Politics_of_Oman