Ahmed joined the Ministry of Foreign Affairs on 25 January 1999 as an Assistant Secretary.[3] He began his diplomatic service with postings in Manila, Brussels, New York, Moscow, and Beijing, gradually rising through the ranks.[3] In Manila, he worked on bilateral issues with the Philippines and international organizations such as the ADB and IRRI.[3] In Brussels, he was engaged in multilateral and European affairs and served concurrently with Luxembourg and Switzerland.[3]
In 2009, Ahmed joined the Permanent Mission of Bangladesh to the United Nations in New York as Counsellor, working on Second and First Committee issues such as LDCs, climate change, and disarmament.[3] He later served in the embassies in Moscow and Beijing, overseeing relations with countries like Mongolia, North Korea, and several post-Soviet states.[3]
From 2015 to 2018, Ahmed served as Director General in various capacities in Dhaka, including External Publicity, SAARC, BIMSTEC, and West Asia.[3] He was promoted to C-Grade Ambassador in 2017.[3] Between 2018 and 2021, he served as Deputy High Commissioner in Canberra, covering Australia, New Zealand, and Fiji.[3] From 2021 to 2023, Ahmed was posted as Chargé d'Affaires to Sudan, where he led the opening of a new mission, which was later closed due to war.[3]
In November 2023, Ahmed returned to Dhaka to serve as Director General at the Ministry of Foreign Affairs.[3] In December 2024, he was appointed as the Ambassador of Bangladesh to the United Arab Emirates.[4] He held a meeting with the Pakistan Ambassador Faisal Niaz Tirmizi in Abu Dhabi in January 2025.[5] He hosted chief advisor Muhammad Yunus of the Interim government in February 2024.[6]