Lt. Gen. Sein Win (Burmese: စိန်ဝင်း, pronounced [sèiɴ wɪ́ɴ]) is a Burmese politician and lieutenant general in the Myanmar Armed Forces who served as the Minister of Defence of Myanmar from 24 August 2015[1] to 1 February 2021.

Sein Win was born on 24 July 1956 to Chit Maung and Daw Kyi in the village of Khabaungkyaing in Taze Township, Sagaing Division, Burma (now Sagaing Region, Myanmar).

[2] Sein Win graduated from the 54th intake of the Officers Training School, Bahtoo.

Previously he was Chief of Staff of the Bureau of Air Defence of the Myanmar Army.

[4] In his capacity as Defense Minister, Sein Win also attended occasional regional meetings and might therefore be able to potentially relate to other Southeast Asian governments on relevant issues.