Hassanudin enlisted in the Indonesian Army and was commissioned as an air-defense artillery officer in 1989 after he graduated at Indonesian Military Academy in the same year.[6] He has held multiple command and staff positions including Commander of 1st Air-defense Artillery Regiment in 2011. Then, he served as First Main Auxiliary Officer for Strategic Plan Policy at the Indonesian Army Planning Staff in 2012. In 2013, he served as Assistant for Planning of the Chief of Staff of 1st Military Regional Command. He also has served as Commander of Air-defense Artillery Education Centre between 2013 and 2014 before he served as Commander of 45th Military Ressort Command until 2015.[8]
In 2017, Hassanudin served as Chief Inspector of Budget Program Planning at the Inspectorate General of the Indonesian Army before he appointed as Vice Assistant for Planning to the Chief of Staff of the Indonesian Army and promoted to the rank Brigadier-General in the same year.[9] That position he held until 2018 when he appointed as the Chief of Staff of 1st Military Regional Command.[10] In 2019, he appointed as Assistant for Planning and Budget of the Chief of Staff of the Indonesian Army and promoted to the rank Major-General in the same year.[11][12]
In 2020, he appointed as Commander of the Iskandar Muda Military Region Command who succeeding Teguh Arief Indratmoko who appointed as Assistant for Intelligence of the Chief of Staff of the Indonesian Army.[13] In the same year, he appointed as Commander of 1st Military Regional Command.[14][1] In 2022, he appointed as Deputy Inspector General of the Indonesian Army and that position he held until 2023 before he retired.[4][15]