Dr. Nikolaos Porfyris is currently Chief Operating Officer (COO) at ATHEX Group. He has been with the Athens Exchange Group since 1998 in several positions, as Head of Research & Development of Derivatives (ADEX), Director of Business Development of Derivatives Market (ADEX), Director of International Affairs, Director of the Central Registry, Deputy Chief Operating Officer, Chief Business Development Officer and Chief Post-trading & International Business Development Officer. He is currently Vice Chair of the Markets Steering Committee of Athens Exchange.

He is representing ATHEX Group in European Associations such as the Federation of European Stock Exchanges (FESE), where he is also Vice Chair of the Management Committee, the European Central Depositories Association (ECSDA) and European Association of Clearing Houses (EACH).