For protesting against the Assassination of Sheikh Mujibur Rahman he was sent to jail in 1975. He was elected again as MP of Chittagong-4. He was appointed as a Director of Rupali Bank in 1997. He was also appointed as Bangladeshi Ambassador to Oman in 2010. He was the Chairman of Chittagong University Registered Graduate Forum. Chowdhury affiliated with other organization such as the Bangladesh Tea Board, Bangladesh Red Crescent Society, Chittagong Association of Dhaka, Family Planning Commission and others.