From this point on, Amir did not take any more field assignments. From 1950 to 1959, he was a legal advisor at the Army Headquarters and also took the opportunity to complete a course at the Military Laws Academy in 1957. In 1960, he was Chairman of the Mass Mobilization for the Liberation of West Irian National Front before being transferred to KODAM VI/Siliwangi as its judicial officer. He was also Materials Assistant for the Development of Functional Potential at the Army Headquarters. In 1962, he became Chairman of the West Irian War Theater Field Council. The next year, in 1963, Amir graduated from the University of Military Laws and from there, he worked under ABRI Chief of Staff Abdul Haris Nasution as Deputy Secretary for Functional Affairs.