Ahmad was the first Bengali Military officer to revolt against the Pakistani army on 25 March 1971 before the start of the Bangladesh Liberation War.

[2] After the independence of Bangladesh he was promoted to the rank of Major in October 1972.Later he served as the second in Command of 19,9,10 and 6 East Bengal Regiment.In September 1975 he was promoted to the rank of Lieutenant Colonel and was appointed as the commanding officer of 24 East Bengal Regiment in Saidpur.In November 1975 he was posted to Army Headquarters as General Staff Officer-1 (Operations).Later he served in the office of Army Chief,DCMLA,CMLA and the President of Bangladesh.In January 1980 he was promoted to the rank of Colonel.On 10 January 1980 he resigned from the Army.

Ahmad is highly regarded as one of the key founding members of the Bangladesh Nationalist Party (BNP).

On 26 October 2006, Ahmad and several other senior leaders of the BNP defected to form the Liberal Democratic Party.

[5] While performing as Chief Coordinator for 20 Party Alliance, Ahmad launched a new movement called "Jatiya Mukti Mancha" on 27 June 2019.