[3][4] He is the secretary general of Transparency International Bangladesh and an executive committee member of Citizens for Good Governance (SHUJAN).

[9] On 31 October 2006, Majumder was appointed the principal secretary to the chief advisor of the caretaker government.

[15] In March 2015, Majumder was relieved of contempt charges by a court; related to a case against David Bergman.

[17] He criticized the government providing interest free loans to civil service officers to buy cars.

[19] He has been critical of the Awami League government politicizing the bureaucracy and reducing the quality of the service.

On 20 January 2025, He was appointed as Adviser of Land as an additional duty to the Interim Government of Bangladesh.