John S. Koudounis is President and Chief Executive Officer of Mizuho Securities USA, (MSUSA) the U.S. broker- dealer subsidiary of Mizuho Securities Co., Ltd, and a member of the global Mizuho Financial Group. MSUSA provides capital markets and investment banking services to institutional clients, specializing in fixed income, equity, mergers & acquisitions, futures and structured finance.

Prior to his appointment as President and CEO, Mr. Koudounis served as Executive Managing Director and Head of Fixed Income for MSUSA, where he was responsible for leading all aspects of the firm's activities in trading, sales and investment banking. He also sits on the firm's Executive Management Committee, Risk Committee and New Product Committee.

Mr. Koudounis was formerly Managing Director and Head of Fixed Income for ABN AMRO North America. Mr. Koudounis began his career at Merrill Lynch in 1988. A native of Chicago, Mr. Koudounis received his Bachelor's degree from Brown University in 1988, where he studied International Diplomacy & Foreign Affairs and Economics. John is a member of the Economic Club of Chicago. He is married with two children.