In November 1949, he also served as the Secretary of the Disarming Section of the Defense Commission at the Dutch-Indonesian Round Table Conference, at which the Dutch agreed to transfer sovereignty to Indonesia.

From August 1962 to 1964 he was Army Inspector General, and in 1963 was also appointed head of the Strategic Materials Section of the Supreme Operational Command (KOTI).

His final position, which he took up on 1 July 1964, was Third Deputy to Army Chief of Staff Lieutenant General Ahmad Yani.

In the early hours of 1 October 1965, members of the Tjakrabirawa, calling themselves the 30 September Movement, broke into Haryono's home at Jalan Prambanan No.

However, Haryono was suspicious and switched off the lights telling his wife to move with their children to an adjoining room.