Moin was commissioned in the 45th batch of Bangladesh Navy.[4]
From 2007 to 2010, Moin had served as the deputy director of the Intelligence Branch of Rapid Action Battalion headquarters.[4] He was awarded the Bangladesh Police Medal for arresting the suspects in the 2004 Dhaka grenade attack case.[4]
Moin had served in the United Nations–African Union Mission in Darfur.[4]
In December 2019, Moin was sent to Rapid Action Battalion on deputation from Bangladesh Navy.[4] He was appointed director of Communications and MIS Wing of Rapid Action Battalion.[4] He introduced Onsite Identification and Verification System to identify suspects detained on location.[5]
In March 2021, Moin was appointed director of the Legal and Media Wing of the Rapid Action Battalion replacing Lieutenant colonel Ashiq Billah.[4] He had defended the human rights record of Rapid Action Battalion, which has been sanctioned by the United States for human rights violations.[6][7] He said, "Very few forces in the world show humanity like RAB".[8] In January 2022, he was awarded the Bangladesh Police Medal again.[9][10]