Mya Tun Oo's rapid rise through the armed forces was noted by political observers, known for his professional record in both field combat and staff roles.[7] By 2010, he was promoted to the rank of brigadier-general, serving as the rector of the Defence Services Academy, his alma mater.[5] From 2011 to 2012, he served as the commander of the Eastern Central Command, which encompasses central Shan State.[6] In 2012, he was promoted to the rank of major general, serving as the army's chief of staff, chief of military security affairs, and chief of the Bureau of Special Operations 6.[5] From 2015 to 2017, he served as the head of Bureau of Operations - 5, which includes the Naypyidaw and Western Commands.[6] On 26 August 2016, he was promoted to the rank of general, serving as the chief of general staff for the army, navy, and air force.[5] After years of speculation, he was appointed by the Commander-in-Chief of Defence Services as the Minister for Defence on 1 February 2021.[8][9][10] On the following day (2 February 2021), he was appointed a member of the State Administration Council by the Commander-in-Chief of Defence Services.[2]
The Government of Canada has imposed sanctions on him since 18 February 2021, pursuant to Special Economic Measures Act and Special Economic Measures (Burma) Regulations, in response to the gravity of the human rights and humanitarian situation in Myanmar (formerly Burma).[12] Canadian sanctions include freezing potential assets in Canada and a ban on transactions with Canadian individuals.[13][14]
Furthermore, the Council of the European Union has imposed sanctions on him since 22 March 2021, pursuant to Council Regulation (EU) 2021/479 and Council Implementing Regulation (EU) 2021/480 which amended Council Regulation (EU) No 401/2013, for his responsibility for the military coup and the subsequent military and police repression against peaceful demonstrators. The EU sanctions include freezing of assets under member countries of the EU and ban on traveling or transiting to the countries.[16][17]