Mahmood is a career diplomat from the 17th batch of Bangladesh Civil Service (BCS) Foreign Affairs cadre.
He served in different positions in Bangladesh missions in Brussels, Singapore, New York and Hong Kong.
At the headquarters, Mahmood worked for multiple wings in different capacities.
The career diplomat obtained his MBA from the Institute of Business Administration of the University of Dhaka.
Mahmood did his graduation and post-graduation in economics from the same university.
He is a fellow of the US Department of Defense institute Asia-Pacific Center for Security Studies
The seasoned diplomat also completed the National Defence Course (NDC) from the National Defence College of Bangladesh.