Mustapha began his career at Societe Generale Bank of Nigeria Limited in 1991 as a Customer Relations Officer. He left in 1994, to join Dynasty Group (Chartered Accountants) where he worked till 1996 and was immediately employed as Senior Supervisor at Federal Mortgage Bank of Nigeria. He was with NAL Merchant Bank Plc from 1997 to 2001 and was part of the team that greatly improved sales in the Ibadan Area Office. In 2001, he joined Finbank (now FCMB) as the Regional Manager, Ilorin and held other roles as Divisional Head, Public Sector and Zonal Head, Abuja till the FCMB – FINBANK merger in 2012 when he was appointed as Head, Public Sector Northern Region.
He holds a Bachelor’s degree in Management Studies from Usman Danfodio University, Sokoto and an MBA from University of Ilorin. He is an Associate Member of the Institute of Chartered Accountants of Nigeria.