He earned a PhD in Accounting from Florida Atlantic University, USA in 2004. He has taught in Accounting and Finance departments for more than 15 years at institutions such as Florida Atlantic University, University of Southern Indiana and American University of Sharjah (AUS). His areas of teaching interests are accounting information systems, financial accounting, managerial accounting, intermediate accounting, advanced accounting and accounting for Islamic financial institutions. His areas of research interests are capital market research, return on R&D and IT investments, corporate governance, voluntary disclosure, Islamic finance and Islamic accounting standards. Dr. Khallaf is the 2016 recipient of the best teacher award in the school of business at AUS.