Admiral (Ret.) Siwi Sukma Adji | |
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| Born | 14 May 1962 Cimahi, West Java, Indonesia |
| Allegiance |  Indonesia |
| Service/ |  Indonesian Navy |
| Years of service | 1985–2020 |
| Rank |  Admiral |
| Commands | Chief of Staff of Indonesian Navy Commander-general of Armed Forces Academy Commander of Western Fleet |
Admiral (Ret.) Siwi Sukma Adji (born 14 May 1962) is a retired admiral of the Indonesian Navy who had served as its chief of staff (Indonesian: Kepala Staf Angkatan Laut, abbreviated KSAL or Kasal) since 23 May 2018 until 20 May 2020, 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.