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Mr. Koudounis is the former President and CEO of Mizuho Securities USA Inc. and brings exemplary executive leadership experience in the private sector. During his tenure at Mizuho Securities USA, Mr. Koudounis helped lead Mizuho through a period of substantial growth.

Mizuho Securities USA is a subsidiary of the Mizuho Financial Group and offers clients a broad range of products and market access across Fixed Income, Equity, Futures, Investment Banking and Wholesale Banking. 

Mr. Koudounis served on the Board of Directors of Mizuho Securities USA and is a member of the Economic Club of Chicago, the Bretton Woods Committee and a participant of the Group of Thirty. Mr. Koudounis’ philanthropic activities include Board of Directors positions with The Hellenic Initiative and the National Hellenic Museum.  As the newest member of the Concordia Leadership Council, Mr. Koudounis will lend his 25 years of private sector experience to help strengthen Concordia’s mission.

“I am honored to join the Concordia Leadership Council and work with its exceptional team. Concordia is developing into a leader across the public-private collaboration field, and I look forward to sharing my vision and experiences to contribute to the future direction and growth of Concordia.” — John Koudounis, Former President and CEO, Mizuho Securities USA Inc.

Concordia Co-Founders Matthew Swift and Nicholas Logothetis, along with The Leadership Council welcome Mr. Koudounis: “We are honored that John is joining Concordia’s Leadership Council. Enhancing the private sector representation on the Concordia Leadership Council is one of our highest priorities as we go into our fourth year, and the addition of John Koudounis will greatly increase our ability to better promote and facilitate public and private sector cooperation. We are grateful for his time and commitment.”