Born in 1960, Ata Köseoğlu graduated from Boğaziçi University Department of Mechanical Engineering in 1982 and completed his MSc degree in Electrical Engineering from Lehigh University and MBA at Boston University. His banking career starting in 1986 at Iktisat Bank and continued at Finansbank. Between 1994-1999, he worked in New York at Bear Stearns and later in Paris, Société Générale, as Managing Director responsible from Turkey and Middle East. Mr. Koseoglu was CEO at Credit Suisse First Boston during 2000-2005, Chairman and CEO at TEB Investment during 2006-2011, Strategy and Business Development President of Sabancı Holding A.Ş. during 2011-2019. He acted as the Chairman of Akçansa and Çimsa, he became President of Retail Group and worked as the Chairman of both Carrefoursa and Teknosa in April 2017.
Köseoğlu currently serves as Senior Advisor at Simon Kucher Partners and acts as a consultant to different companies.