Mosun Belo-Olusoga (born 13 September 1957) is a Nigerian financial services industry practitioner, a credit and risk management specialist, and school owner. She served as the chairperson of Access Bank PLC and sits as a non-executive director on the board of Premium Pensions Limited, Action Aid, and MTN Foundation.

Mosun studied Economics at the University of Ibadan and graduated with a bachelor's degree in 1979.^[1] In 1983, she became a chartered accountant finishing as the best qualifying accountant in her set. She also won the SWAN (Society of Women Accountants of Nigeria) award. In 1993, she became a Fellow of the Institute of Chartered Accountants of Nigeria. She is also an Honorary Fellow of the Chartered Institute of Bankers of Nigeria. She is an alumna of the Harvard Business School, Kellogg School of Management and Columbia Business School all in the United States, as well as International Institute for Management Development in Switzerland and INSEAD in France.^[2]

She served as the chairman of Access Bank PLC^[3][4] and sits as a non-executive director on the board of Premium Pension Limited, Action Aid and MTN Foundation.^[5] She is currently^[timeframe?] working at KRC Limited as the principal consultant. She is a director of Action Aid, FCSL Asset Management Limited, and Premium Pension Limited.^[6]

She is the founder of City of Knowledge Academy, Ijebu-Ode.^[7]