He was between 2003 and 2005, the Treasurer and Investment Consultant to OPEC Fund (Vienna, Austria), where he managed an approximately US $5 billion investment portfolio. He is a holder of an MBA (Finance, Accounting and Quantitative Analysis) and, a Ph.D. in Banking & Finance from the University of Maryland, USA. Prof. Adebiyi spent 20 years (1983-2003) at the Islamic Development Bank, Jeddah, serving at different levels in Project Management, Treasury, Financial Analysis and Portfolio Management. He is a visiting Professor of Portfolio Investment Management and Quantitative Analysis to the Bowie State University, Maryland, USA.