In Citigroup, promotion to the managing director's post is an outstanding achievement. Congratulating Rashid, Citigroup Asia Pacific Chief Executive Officer Robert Morse said the appointment is recognition of Rashid's contribution towards building the bank's Bangladesh business over the years.

Rashid has worked in various important positions in three leading international banks both at home and abroad for more than twenty years.

Rashid holds a Masters in Business Administration in Strategic Management from Henley Management College in the UK and Masters in Economics from Bangladesh.

He has done various training on strategic management, risk management, marketing, financial engineering and people management from various prestigious institutions at home and abroad which include Indian School of Business, London Business School, Harvard Business School, Kellogg School of Management and New York Institute of Finance. He is a certified credit professional by OMEGA, London and a senior credit officer (SCO) in Citigroup.

Mamun is chairman of International Chamber of Commerce (ICC) Standing Committee on Banking Techniques and Practice for Bangladesh and a nominated director to the Chittagong Stock Exchange.

He is also a director of Marie Stopes Clinic Society. He sits in the academic council of BRAC University and is an executive committee member of Bangladesh Foreign Exchange Dealers' Association (BAFEDA).

He is also associated with many other social and philanthropic organisations. Widely recognised as a specialist on foreign exchange and foreign trade, he regularly contributes to various local and international newspapers and journals.