Mohsin died while undergoing treatment at Dhaka's Combined Military Hospital on Monday at 9:30am, as confirmed by Selina Haque, an additional secretary to the defence ministry. Prime Minister Sheikh Hasina expressed her deep sorrow over Mohsin's passing and extended her condolences to his family. Mohsin had been admitted to CMH on June 2 after testing positive for COVID-19, and was later transferred to the intensive care unit and received plasma therapy as his condition worsened. He was promoted to the rank of senior secretary on June 14 while still in the hospital, and was the younger brother of former principal secretary Kamal Abdul Naser Chowdhury. Mohsin, who was born in Cumilla in 1963, obtained an MSc in Soil Science from Dhaka University and later a MA in Governance Studies from Northern University in Dhaka. A member of the 1985 BCS batch, Mohsin held various positions in the Ministry of Fisheries and Livestock, Ministry of Finance, Ministry of Industries, Ministry of Health and Family Welfare, and the Prime Minister's Office. He served as the secretary to the Ministry of Environment, Forest and Climate Change before moving to the defence ministry.