Management Team

​​ Please find below detailed information on our management team.​


Dr. Ali Taha Koç

Chief Executive Officer

Dr. Ali Taha Koç was born in Ankara in 1980. He completed his undergraduate degree in 2001 at Bilkent University, Department of Electrical and Electronics Engineering with full scholarship. Afterwards, he received his master's and doctorate degrees in the Department of Electrical Engineering at University of Texas at Dallas, both with full scholarships. Dr. Ali Taha Koç joined Intel in 2006 as a research and development (R&D) engineer in the USA. During his tenure at Intel, he developed 61 patents, published 23 scientific articles, and developed and managed several international projects. In 2013, he became one of the 10 awarded engineers who developed the most patents at Intel. After returning to Türkiye in 2014, he started to work as the Chief Counsellor of the Prime Ministry and in the same year he was appointed as the Head of Information Technologies of the Presidency. During his tenure at the Presidency, he also managed the formation of the State Information Coordination Center (SICC) in the Presidency Security Policies Department, and started the information flow from all ministries and security units to the Presidency. Koç was appointed as the Head of Digital Transformation Office on 12 September 2018. Besides his duties at the Presidency, he also served as a board member of Türksat Uydu Haberleşme Kablo TV ve İşletme A.Ş. (Türksat Satellite Communications Cable TV and Business Inc.). Koç teaches graduate and doctorate courses at the Department of Electrical and Electronics Engineering at Bilkent University. He is also a licensed pilot, fluent in English and married with one child.


Kamil Kalyon

Chief Financial Officer

Kamil Kalyon began his professional career at the Ernst & Young Turkey (EY) Tax department in 1996. During his twelve-year career at EY, he took part in many strategic projects, ultimately holding the position of Senior Manager. Between 2008 and 2012, he worked as the Finance Director in Kont Bilişim Group operating in the information technologies sector. He entered OMV Petrol Ofisi A.Ş. as Tax Director in 2012 where he remained for four years. Kamil Kalyon joined Turkcell İletişim Hizmetleri A.Ş. as Tax and Group Reporting Director in December 2016 and has been working as the Financial Planning and Analysis Director at our Company since February 2021. As of September 2023, he was appointed Turkcell's Vice President Responsible for Finance. Kamil Kalyon graduated from the Marmara University Department of Business Administration, and holds the titles of Sworn-in Certified Financial Advisor and Independent Auditor.


Kadri Özdal

Chief Sales Officer

He started his professional career at Vodafone in 1999 and worked in sales, marketing and commercial operations departments, and later joined Turk Telekom in sales development, channel optimization and management. He worked as sales development director and then acting as CSO between 2011-2012. Kadri Özdal took part in foundation and management of which is one of the largest e-commerce platforms in Turkey and worked in the CSO role. In February 2016, he started as Turkcell Alternative Sales Channels Director and subsequently served as non-exclusive and digital sales channels, finally as Retail Channels Sales Director. Kadri Özdal graduated from Dokuz Eylül University, Faculty of Economics and Administrative Sciences, Department of Public Administration.


Mustafa Demirhan

Chief Information and Communication Technologies Officer

Mustafa Demirhan completed his undergraduate studies in the Electrical and Electronics Engineering department of Bilkent University with a full scholarship in 2001, and received his master's degree in the Electrical and Electronics Engineering department of Rutgers University in 2003. Mustafa Demirhan, who started his professional career as a research and development engineer at Intel in 2003, developed 14 patents until 2007. In 2007, he started working on smartphone software at Microsoft. Later, he took on the manager role in projects such as Microsoft 365, Microsoft's first successful cloud computing product, and subsequently, Microsoft Azure. He served as a manager in open-source cloud computing projects at Google in 2018, and returned to Microsoft in 2021 to manage critical projects in the field of cyber security. Mustafa Demirhan is married and has four children.


Murat Akgüç

Chief Marketing and Digital Services Officer

Murat Akgüç completed his undergraduate degree at Boğaziçi University, Department of Industrial Engineering, and the Executive MBA program at Rotterdam School of Management. He has over 20 years of experience in business development, technology, telecommunications, strategy, digital innovation and venture capital. Akgüç, who started his career at the Osmanlı Bank, later worked in treasury projects in the banking sector. In 2004, he served as Vice President of Business Development and Strategy at Credit Europe Bank in the Netherlands. Akgüç, who returned to Turkey in 2015, held senior management positions in the fields of technology, digital product development, strategy and marketing in the media and gaming industry on an international scale. He started working as Deputy General Manager responsible for Venture Capital and Technology Investments at the Turkey Wealth Fund, which he joined in 2021. He led the establishment of the Turkey Technology Fund - TTF, which invests in Turkey Venture Capital funds, and other important projects, especially the acquisition of Türk Telekom, which is Turkey's largest acquisition in 2022. In addition to these duties, he served as a Member of the Board of Directors of Türkiye Sigorta and Member of the Board of Directors of TVF Technologies Investments.


Erkan Durdu

Chief People and Business Support Officer

Mr. Erkan Durdu completed his undergraduate studies in the Radio and Television department of Istanbul University and received his master's degree in the Communication Sciences department at Marmara University. He began his career as a program producer at TRT Istanbul Radio, and worked as a reporter and editor at Kanal 7, Radikal, and Akşam newspapers. From 2003 to 2011, he served as a Minister Advisor at the Prime Ministry. Between 2011 and 2014, he held the position of Deputy Director General of Press, Publishing, and Information at the Prime Ministry. From 2014 to 2021, he served as Vice Chairman of the Board and Deputy General Manager at TRT. Between 2022-2023, he held the position of General Secretary at TÜBİTAK. In addition to these roles, he served in various important positions such as a member of the Audit Committee at the Development Bank, a member of the Board of Directors at Euronews, and a member of the Board of Directors at the Press Advertisement Agency. He provided leadership in areas such as Human Resources, Budget and Financial Operations, Broadcast Strategies, Change Management, Content Management, and Digital Business Services in the institutions where he worked.


Ali Uysal

Chief Legal and Regulation Officer

Ali Uysal started his professional career as a lawyer in 2003 and worked as a senior lawyer in the corporate consultancy department of law firms serving national and international clients until 2009. In 2009, he started working at SunExpress Airlines, a joint venture company of Turkish Airlines and Lufthansa, as Legal Counsel responsible for the establishment of the Company's internal legal department and continued until 2014. Ali Uysal, who served as the General Legal Counsel of Turkish Airlines between 2014 and 2019, has been working as the Corporate Legal Affairs Director within the Deputy General Manager of Legal Regulation at Turkcell İletişim Hizmetleri A.Ş. since 2020. Ali Uysal, a graduate of Istanbul University Faculty of Law, completed his master's degree in European Union Law at Stockholm University Faculty of Law.


Prof. Dr. Vehbi Çağrı Güngör

Chief Network Technologies Officer

Prof. Dr. Vehbi Çağrı Güngör was born in Ankara in 1979. He received his B.Sc. and M.Sc. degrees from Middle East Technical University, Department of Electrical and Electronics Engineering in 2001 and 2003. He obtained his Ph.D. degree from the Department of Electrical and Computer Engineering at Georgia Institute of Technology (Atlanta, GA, USA) in 2007. Receiving the Full-Professor title in 2018, Prof. Dr. Güngör's research areas are in the fields of next-generation wireless communications, 5G and 6G mobile networks, Internet of Things and Artificial Intelligence. Prof. Dr. Güngör served as a project manager at Eaton Corporation, a researcher at Siemens Corporate Research, and an Executive Board Member in the TÜBİTAK TEYDEB BILTEG. Prof. Dr. Güngör has received many international and national scientific awards. Prof. Dr. Güngör's research projects have been funded by several institutions, such as the European Union, the Ministry of Science, Industry and Technology, and TÜBİTAK. Prof. Dr. Güngör has more than 100 research articles published in international peer-reviewed journals and conferences and several patents. Prof. Dr. Güngör is married and the father of three children.