The private wedding ceremony held on Saturday and was graced by selected family members as well as friends.
Prior to his much-awaited wedding, Onyema had made the headlines on numerous occasions over his alleged refusal to marry, given his social status.
Onyema was appointed as the CEO of the NSE in 2011 and has remained in that capacity since then.
Before his foray into the NSE, Onyema had occupied several other high-profile administrative positions spanning over 20 years including his stint at the United States financial markets.