Oscar Onyema is the Chief Executive Officer of The Nigerian Stock Exchange.  Prior to this role, he served for about 15 years in United States financial markets managing market structure initiatives, products and securities exchange businesses.  He served for four years in the Nigerian information technology sector before moving to the US.

Mr. Onyema is also the Chairman of Central Securities Clearing System (CSCS) Limited, which is the Clearing House of the Nigerian Stock market.  He is a council member of the Chartered Institute of Stockbrokers of Nigeria.

In 2009, Mr. Onyema founded Market Strategists LLC and consulted under the Gerson Lehrman Group platform in the United States.  He successfully completed consultations enabling decision-makers at investment firms and corporations better understand products, services, companies, and issues in global financial markets.

He has served as the first black Senior Vice President and Chief Administrative Officer of American Stock Exchange (Amex), which he joined in 2001.  He was instrumental in integrating Amex equity business into NYSE Euronext after it acquired Amex in 2008.  He then managed NYSE Amex equity trading business, which he helped position as a premier market for small and mid cap securities.

In 2008, Mr. Onyema got Financial Industry Regulatory Authority (FINRA) Series 7, 24, and 63 brokerage licenses with Seamount Execution Services LLC, a FINRA member firm in New York.

OSCAR N.  ONYEMA, OON, FIoD   is the Chief Executive Officer of the Nigerian Stock Exchange and member of  the National Council of The Exchange since April 2011. In this role, he  is responsible for superintending​ the general working of The Exchange.    He is Chairman of Central Securities Clearing System Plc (CSCS), the  clearing, settlement and depository for the Nigerian capital market;   Chairman of NG Clearing, which is in the process of developing a CCP;  and Chairman of the subsidiaries of The Exchange.


He is a member of several advisory boards including London Stock  Exchange Group (LSEG) Africa Advisory Group (LAAG) and Thomson  Reuters Africa Advisory Network.


Mr. Onyema was the President of African Securities Exchanges  Association (ASEA) until November 2018. He has served as a Council  member of Chartered Institute of Stockbrokers (CIS); Global Agenda  Council member of World Economic Forum (WEF); board member of
FMDQ OTC PLC and National Pension Commission of Nigeria (PENCOM).    Prior to relocating to Nigeria, he served as Senior Vice President and  Chief Administrative Officer at American Stock Exchange (Amex). He  also ran the NYSE Amex equity business after the merger of NYSE
Euronext and Amex in 2008.


He holds the Nigerian national honour of Officer of the Order of the Niger  (OON); is a Fellow of the Institute of Directors (IOD); Fellow of the  Chartered Institute of Stockbrokers (CIS); Associate of Chartered  Institute for Securities & Investment (CISI) in the UK; Holder of FINRA
Series 7, 24, and 63 in the USA.


Mr. Onyema completed the Harvard Business School Advanced  Management Program (AMP) in 2015. He got his MBA from Baruch  College, New York in 1998; and BSc degree from Obafemi Awolowo  University, Ile-Ife, in 1991.   Amongst several accolades, Forbes Magazine listed him as one of the  ten most powerful men in Africa in 2015.