In 1985, Ahmed became an associate member of Institute of Chartered Accountants of Bangladesh.[5] Ahmed received his Institute of Chartered Accountants of Bangladesh in 1990.[5]
In 2009, Ahmed became the chairperson of Emerging Credit Rating Limited.[5]
Ahmed became a director of Dhaka Stock Exchange in 2010.[5] He became a director of Grameenphone in 2011.[5] He served on the board of directors of Power Grid Company of Bangladesh Limited.[5]
In 2015, Ahmed became the general secretary of the Bangladesh Economic Association.[5] He was re-elected in 2017 with Dr Abul Barakat being elected president of the Bangladesh Economic Association.[6]
From August 2019 to July 2020, Ahmed was the chairperson of Janata Bank.[5] On 28 July 2020, S. M. Mahfuzur Rahman was appointed chairperson of Janata Bank replacing Ahmed, who had faced allegations of graft in approving loans.[7][8] He denied all allegations against him.[8] He had opposed large loans of Janata Bank.[9] Hedayetullah Al Mamun was briefly appointed chairman but removed soon after his appointment.[8] Bangladesh Pratidin later reported that both men were removed through the effort of S. Alam, owner of S. Alam Group,[10] who had secured large loans from various banks including Janata Bank through close connections with the Awami League government.[11]
From 2023 to 2024, Ahmed was a member of the syndicate body of Bangladesh University of Engineering and Technology.[5]