Jusuf actually started his military career in the Navy, becoming the adjutant of Navy Lieutenant Colonel Kahar Muzakkar at the 10th Navy Staff Commando headquarters in Yogyakarta.
Jusuf sebenarnya mulai karier militernya di Angkatan Laut, menjadi ajudan dari Angkatan Laut Letnan Kolonel Kahar Muzakkar di Angkatan Laut ke-10 Staf Komando kantor pusat di Yogyakarta.