Htun Aung graduated from the 29th batch of the Defence Services Academy.

[2] In 2020, he sat on the board of directors of Myanma Economic Holdings Limited, a military-owned conglomerate.

[6] In the aftermath of the 2021 Myanmar coup d'état, the Burmese military has launched airstrikes against anti-regime resistance forces and civilians.

[7] On 30 June 2022, under Htun Aung's command, a Burmese fighter jet violated Thai airspace after flying 4–5 kilometres (2.5–3.1 mi) into Phop Phra district in Thailand's Tak province.

[8][9] Htun Aung subsequently issued an apology to this Thai counterpart, Napadej Dhupatemiya.