foreign affairs

Thaung Tun joined ministry of Foreign Affairs in 1972 and served at headquarters and abroad and retired in 2010. He served as ambassador to the Philippines, Belgium, the Netherlands and the EU under the former military regime. He also served as director general for political affairs department of Foreign Affairs ministry. While he was serving as ambassador to Philippines, he said retained Aung San Suu Kyi "must not rock the boat" when commenting on the NLD boycott of the military junta's controversial constitution convention at a 2006 press conference in Manila.^[2] In 2016, he served as Government Relations Advisor for Shell Myanmar Energy PTE.

National Security Advisor

In 2017 president Htin Kyaw appointed him in new position, National Security Advisor. The position was created as the government faces ongoing clashes with ethnic armed groups in the country's north and east while attacks by Muslim militants with international connections sparked a large security operation in western Rakhine State.

Union Minister

He became the union minister of newly formed ministry, Union Government Office Ministry in November 2017. He was appointed by president Htin Kyaw. This ministry serves the duties of the Union Government.

In November 2018, the President U Win Myint proposed the formation of the new Union-level ministry to Hluttaw for approval. The new ministry will be a merger between the Foreign Economic Relations Department and the Directorate of Investment and Company Administration from the Ministry of Planning and Finance. The cabinet's representative Tun Tun Oo said the formation of the new ministry would provide swifter investment-related information to local and international investors, real-time collaboration with relevant departments and dispute resolution among investors. The Pyidaungsu Hluttaw approved the formation in November 2018. Thaung Tun has been transferred from government office minister to his new position of minister for the Ministry of Investment and Foreign Economic Relations.

Chairman of MIC

After the resignation of Planning and Finance minister Kyaw Win who also the Chairman of Myanmar Investment Commission, Thaung Tun became the new chairman. President Win Myint formed the new commission with 13 members. Investment and Foreign Economic minister Thaung Tun served as chairman and Commerce minister Than Myint served as vice chairman.

In the aftermath of the military-led 2021 Myanmar coup d'état, the Myanmar Armed Forces appointed Aung Naing Oo as Thaung Tun's successor for investment and foreign economic minister on 1 February 2021.^[3] On 4 March 2021, a member of State Administration Council Lieutenant General Moe Myint Tun became the new chairman for MIC.