[1] He also served as the ambassador of Bangladesh to Sri Lanka, Germany, Vietnam and United States.

[4] He served as the Deputy Chief of Protocol and Director (West Europe) in the Foreign Ministry from 1975 to 1978.

[4] Chowdhury represented Bangladesh in International Conferences in the FAO, World Food Programme & Non-Aligned meetings.

[3] Chowdhury wrote an article for the Wall Street Journal in which he criticized the government targeting Grameen Bank and Mohammad Yunus and viewing as part of wider problems with democracy in Bangladesh.

[10] He was nominated to contest the 2018 general election from Sylhet-6 as a candidate of Bikalpa Dhara, which was in an alliance with the Awami League.

[11] He quit the election after the Awami League led grand alliance nominated Nurul Islam Nahid.

[16] Chowdhury was prevented from leaving Bangladesh on 17 October 2024 after the fall of the Sheikh Hasina led Awami League government.

[17] He was arrested by Detective Branch from his home in Banani DOHS that night according to deputy commissioner Muhammad Talebur Rabman.

[17][18] According to the Police he was arrested in a case filed by the Bangladesh Nationalist Party on 14 September over an attack on their office on 28 October 2023 and taken to headquarters of Detective Branch.