Siwi Sukma Adji is an admiral of the Indonesian Navy who has served as its chief of staff (Indonesian: Kepala Staf Angkatan Laut, abbreviated KSAL or Kasal) since 23 May 2018, replacing Ade Supandi who was retiring.
Before becoming chief of staff, he had served as the commander-general of the National Armed Forces Academy, Advisor for General Planning in TNI HQ, and commander of the western fleet.