Managing Board

Mr. S. Erhan Zeyneloğlu, Chief Executive Officer (since October 2015)

Mr. Erhan Zeyneloğlu began his career at Garanti Bankasi in Turkey. He joined GBI in 1995. Before his appointment as CEO, Mr. Zeyneloğlu held several managerial positions in various departments, lastly as Executive Director responsible for Structured Finance and Retail Banking.


Mr. Marco Witteveen, Chief Operating Officer (since June 2016)

Mr. Marco Witteveen started his professional life in 1985 as a management trainee at ING Bank, London. During his 30 years banking career, Mr. Witteveen held various positions in several Dutch banks, lastly at NIBC Bank as the Managing Director of Technology and Operations.


Dr. Övünç Şişman, Chief Financial Officer (since October 2015)

After holding several positions in the Risk Management team at Osmanli Bankasi and Garanti Bankasi in Turkey, Dr. Şişman joined GBI in 2003 and started at the Credits division. In 2006, Dr. Sisman became the Manager of Risk Management department. In 2011, he was appointed as the Executive Director of Risk Management, Control & Reporting.


Mr. Cem Bahadır Mutlu, Chief Risk Officer (since January 2018)

Mr. Mutlu joined GBI in June 2017 as Executive Director Credits. Following all necessary approvals, Mr Mutlu was formally appointed as a member of the Managing Board and Chief Credit Officer as of 11-January-2018. During his 25 years banking career, Mr. Mutlu held various positions in several Turkish banks. Between 2007 and 2008, Mr Mutlu headed Garanti’s Luxembourg Branch. Before joining GBI, Mr Mutlu was the Corporate Branch Manager of Garanti’s Istanbul Corporate Branch. He holds bachelor of arts degree in Economics from Ankara University’s Faculty of Political Sciences.