[1][2] On 26 March 2004, when Rapid Action Battalion or RAB was founded, Ahmed was deputed from Bangladesh Army to the role of commanding officer of RAB-3 division.

[3] Mominullah David, Jubo Dal leader and accused in 31 criminal cases, was killed in a shootout with RAB officers under Ahmed's command in Malibagh in November 2004.

[4] Founder of Purbo Banglar Communist Party Mofakkhar Hossain, also known as Mahamud Hasan, shootout with RAB officers from RAB-3 in December 2004.

He was the mastermind of the operation in March 2006 which led to arrest of hundreds of Jamaat-ul-Mujahideen members, a Bangladeshi terrorist group, and 6 top leaders including Shaykh Abdur Rahman and Bangla Bhai.

[9] His team also successfully captured large stock of explosives, nitric acid and grenades belonging to Jamaat-ul-Mujahideen in November 2008.

[1][10] He reported the arrest of AKM Fazlul Haque Milon, former member of parliament from Bangladesh Nationalist Party, by RAB on corruption charges on 5 September 2007.