 Born in East Java, Mujono was educated at the Military Law Academy from 1957 until 1962, and was part of the central leadership of the Golkar party from 1967 to 1971.Mujono was appointed to the Ministry of Law and Human Rights in 1978 after a prior period of civilian officeholders.During his tenure as Minister of Law, Mujono continued the policy of executive interference in judicial affairs established by his predecessor on the Supreme Court, Umar Seno Aji.