On 10 October 2006, Rahman was promoted to District and Sessions Judge.[1]
Rahman became the Senior District and Sessions Judge on 10 October 2011.[1]
In April 2017, Rahman, Judge of the Drug Court, granted bail to Mizanur Rahman, managing director of Rid Pharmaceuticals Limited, and his wife Sheuli Rahman in a case over the death of 28 children who died after consuming contaminated paracetamol manufactured by their pharmaceutical company in 2009.[2]
Rahman was appointed an Additional Judge of the High Court Division on 31 May 2018.[1]
On 30 May 2020, Rahman was made a permanent judge of the High Court Division.[3] He and 17 other judges had to be sworn in twice as the first time they faced technical problems in a virtual ceremony and the second was held in person.[4]
In December 2020, Rahman and Justice Md Rezaul Haque stayed a trail proceedings against Matiur Rahman, editor of Prothom Alo, for six months in a case filed over the death of a student of the Dhaka Residential Model College by electrocution at the program of the newspaper.[5]
Rahman and Justice Md Rezaul Haque granted bail to Mahfuzur Rahman Sharod, in a case over the rape and blackmail of a student of the University of Rajshahi in April.[6] The bail was canceled by Justice Hasan Foez Siddique, of the Appellate Division of the Bangladesh Supreme Court, due to the specific nature of the charges against the accused.[6] In December 2021, Rahman and Justice Jahangir Hossain Selim granted anticipatory bails to Rafiath Rashid Mithila, and Sabnam Faria in a case over the collapse of Evaly.[7] Rahman and Justice Jahangir Hossain Selim granted bail to Ruma Sarker, professor of the Begum Badrunnesa Government Girls' College, who was arrested by Rapid Action Battalion in a Digital Security Act case for making comments on a murder case on Facebook.[8] The bail application was opposed by the Deputy Attorney General, Sarwar Hossain Bappi.[8] Rahman and Justice Jahangir Hossain Selim criticized the government for promoting sub-inspector Nayan Kumar who had tortured a 12 year old into signing a confession.[9][10]
Rahman and Justice ASM Abdul Mobin issued a stay order on three cases against photojournalist Shafiqul Islam Kajol under the Digital Security Act in June 2022.[11][12]