Mahmud is a member of International Growth Centre based at London School of Economics.

He was part of many government committees and commissions in Bangladesh relating to micro-finance, national income, agricultural reforms, PRSP and MDG monitoring.

He was co-founding chairman for PKSF, the apex organization for funding the micro-credit programs of NGOs in Bangladesh.

[12] In September 2022, Mahmud filed a police complaint after his Facebook page was hacked.

[13] Mahmud condemned the arrest of Mirza Fakhrul Islam Alamgir in October 2023, before the general election.