He completed Intermediate studies (H.S.C) from Notre Dame College, Dhaka.
He completed his BS and MS degrees in Public Administration from University of Dhaka.
[3] Mahmood joined the civil service as a member of the Bangladesh Civil Service Administration Cadre in January 1981, and has since held various positions in the government of Bangladesh.
He served as a Senior Secretary to the People's Republic of Bangladesh before his retirement from the civil service.
He held top level positions in different ministries (Finance, Public Administration, Communications & Railways, and Posts & Telecommunications) of the Government.