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Senior Management

Ümit Önal

Ümit Önal, a graduate of Istanbul University Faculty of Communication, started his professional life in media and communication sector. He joined Turkuvaz Media Group in 2007 and served as the General Manager of ATV, Advertising Group President and Executive Board Member, respectively, until 2015.

After being appointed as the Board Member and CEO of Digitürk in 2015, he managed Digitürk's sales process to BeIN Media Group.

Önal joined Türk Telekom family as the Assistant General Manager responsible for Sales and Customer Services at the end of 2016, and in December 2018, he was appointed as the Assistant General Manager responsible for Marketing and Customer Services, and in August 2019, he was appointed as the CEO of the company. He is still serving as the acting Assistant General Manager responsible for Marketing and Customer Services.

Having more than 20 years of experience in the media and communication sector, Önal has contributed significantly to the process of radical change in the Turkish media, and he continues to lead the digital and technological transformation of Turkey in Türk Telekom.

Throughout his career, Ümit Önal has actively taken positions in national and international associations. Önal served as the Chairman of the Board of Mobile Telecommunication Operators Association (m-TOD) in 2020; he is still actively Chairman of TV Monitoring and Research Committee (TİAK A.Ş.); Board Member at Advertisers Association (RVD), member to Foreign Investors Association (YASED) and US Business Council Member of Foreign Economic Relations Board (DEİK); and he represents Türk Telekom at Association of TV Broadcasters (TVYD).

Kaan Aktan

Kaan Aktan, after Galatasaray High School, graduated from Boğaziçi University, Economics in 1995. He started his career at Anadolu Group. He worked in PepsiCo Turkey Operation in 2002 and afterwards he worked at Texas Pacific Group Investment Fund Turkey Asset Management companies as finance manager since 2007. He joined Türk Telekom in 2010 as Director of Financial Projects. He was appointed as TTNET CFO in March 2013. During his successful term of employment, he has also taken on several management roles at Turk Telekom and Turk Telekom Group Companies. Mr. Aktan is serving as Finance Assistant General Manager since December 2016.

Dr. Mehmet Beytur

Mehmet Beytur, after receiving bachelor’s degree in Electronics and Communication Engineering from İstanbul Technical University, he completed his Master's Degree in Economics at Marmara University with his thesis on 'Energy Resources and Cooperation Opportunities of Islamic Countries'. In 2008, he received doctorate degree in Gebze Institute of Technology with his thesis on "Utilization of Outsourcing" in the field of Business Administration.

He started his career as an access engineer at Türk Telekom (at that time PTT) in 1991 and after serving as chief engineer, manager, assistant region manager and provincial manager, he has served as Istanbul Region Manager for more than 10 years. In this role, he carried out technical, commercial and all support functions.

He has worked in technology, customer, system and management based transformation projects in the company and the sector.

Mehmet Beytur is the Chairman of the Board of Directors of the Türk Telekom SYS (Health and Social Aid Foundation), the Chairman of the Board of Directors of the Türk Telekom BYS (Saving and Aid Fund), as well as a member of the Board of Directors of Türk Telekom Basketball Club and Board Member in Türk Telekom Group Companies.

Mehmet Beytur (PhD) is serving as Support Services and Procurement Management Assistant General Manager since September 2019.

İsmail Bütün

Upon graduating from Business Administration Department of Boğaziçi University in 1996, İsmail Bütün started his professional career at Çuhadaroğlu Holding Moscow Office. Between 1997 and 2000, Mr. Bütün worked at Enka Group within Foreign Trade department in Moscow as Sales and Business Development Manager. After joining the team of Nestle Turkey in 2000​, he worked at Nestle as CPW Turkey Country Manager, Regional Marketing Director for Central Asia based in Uzbekistan, and as Head of National Key Accounts for Nestle Turkey respectively. After 2011, he served at Nestle’s Global Headquarters in Switzerland, first as Business Excellence Manager at the Global Customer and Sales Management Unit and then he led global marketing projects as Marketing Manager at the NESCAFE Strategic Business Unit. Mr. Bütün returned to Turkey in 2015 and was appointed as the General Manager of NESCAFE and also as a Board Member of Nestle Turkey.

In January 2016, he joined Turkcell as “Senior Vice President of Retail Sales” in charge of Consumer Sales and also appointed as an Executive Committee Member. Between July 2016 and January 2019, he served as the Chief Marketing Officer and Executive Committee member. In January 2020, Mr. Bütün joined Türk Telekom International as Chief Commercial Officer.

He completed “New Frontiers” program at MIT (Massachusetts Institute of Technology) in 2017; and “Innovative Marketing for Strategic Advantage” program at Stanford University in 2018.

İsmail Bütün is serving as Chief Consumer Sales Officer since May 2020.​

Mustafa Eser

Mustafa Eser graduated from the Department of Physics of Hacettepe University in 1996. Between 1996 and 1998, he conducted his master’s degree studies at the University of Cologne and Heinrich Heine University in Düsseldorf. Since 1998, he has been taking part in Information and Education sectors as an entrepreneur and a manager. Between 2007 and 2014, he worked at Türksat A.Ş as Director. Between 2014 and 2017, he worked as the Manager responsible from Public Sector Relations and Regulation at Digitürk. Since May 2017, he served as the Public Sales Director at Türk Telekom. Furthermore, he is the president of the basketball branch of Türk Telekom Sports Club. Mustafa Eser is married and has three children.

Mustafa Eser is serving as Corporate Sales Assistant General Manager since April 2020.

Ali Gürsoy

Ali Gürsoy graduated in Faculty of Management from Bilkent University in 1993. He started to work for Şişecam Group as Assistant Specialist in 1995 and continued his professional life at Esbank T.A.Ş as Specialist in marketing department.

In 1997 he moved to USA and successfully completed his education at Pace University - M.S. in Investment Management, at Columbia University- Computer Science and M.S. in Financial Mathematics Departments, respectively.

He worked as a financial analyst at ATB Consulting in the United States and then worked as a Financial Risk Manager at Aragon Asset Management. After his return to Turkey in 2006, Ali Gürsoy worked as Assistant General Manager at Risk Türk Financial Software Company for five years. Currently, he is pursuing M.S. in Data Analytics at Sabancı University.

Continuing his professional life since 2011 at Türk Telekom Group as Director of Enterprise Risk Management, he was appointed as Assistant General Manager responsible from finance function at AssisTT A.Ş. in 2018 and he carried out two titles till the end of of 2019.

Mr. Gürsoy is serving as Head of Enterprise Risk and Business Continuity at Türk Telekom since December 2019.

Tahsin Kaplan

Tahsin Kaplan began his career as a attorney at law and has more than 20 years of experience in the field of Corporate Law and Regulation in both private and public institutions. He took office under the titles of Legal Adviser, Group Head of Legal Affairs and held several Board Memberships in finance and media sectors. He has been working as a freelance lawyer since 2016.

Tahsin Kaplan holds a Bachelor’s degree in Law from Marmara University, 1999.​

Barış Karakullukçu

Barış Karakullukçu graduated from İzmir Science High School and then Industrial Engineering Department of Bilkent University. She completed Management Information System Program of Boğaziçi University and Executive MBA program of Koç University.

Her career started in I-Bimsa Company as a consultant in 1996 and she continued in PWC company as senior consultant in 1997. Between 2001 and 2005, she worked at Accenture Company in charge of Global Business Solutions where she has served more than 25 countries. She has continued her career as a Partner at Accenture Turkey Office in 2005. Between 2012 and 2016, she worked as the CEO and Executive Committee Chairman of Mudo and managed the transformation journey of the company. This transformation has been studied in an academic case, which is called “A case of Successful Leadership” in Harvard Business School. From 2017 to 2018, she took over Chief Data and Analytics Officer Position in Turkcell. In 2018, she became the Strategy Director and CEO Advisor in Invent Analytics Company and her most recent position was Global Business Services Country Leader in IBM.

She is lecturing for MBA programs in Özyeğin, Sabancı and Boğaziçi Universities and she is the Chairman of Technology and Innovation Study Group under Foreign Investors Association. She has been listed on 50 Most Powerful Women in Turkey by Fortune in 2012, 2014 and 2016.

Barış Karakullukçu is serving as Strategy, Planning and Digital Assistant General Manager at Türk Telekom since January 2020.

Yusuf Kıraç

Yusuf Kıraç graduated in Electrical and Electronics Engineering from Hacettepe University in 1994. Following his undergraduate studies, in 1996 he started working as a manager in planning and integration management at Siemens and Nokia Siemens Networks.

Mr. Kıraç started to work in Türk Telekom in 2008, taking part in the team that carried out the successful transformation projects in Türk Telekom’s All IP Architecture with Rural Transformation, Türk Telekom NGN and Fiber Transformation projects. In 2010, he assumed the role of Network Director and led many projects that gave profitability and capacity to Türk Telekom such as Fiberkentt, DWDM, MPLS, DC Conversion and TTVPN. In addition to his current role, he also chaired the NANI Working Group of ETNO, European Telecommunication Operators Organization, headquartered in Brussels, between 2010 and 2014. In his managerial role at ETNO, he worked closely with international organizations such as the European Commission, CoCom, ECC, ITU, ETSI, ICANN and RIPE for numbering and addressing issues; migrating from IPv4 to IPv6, number portability, and M2M’s future strategies and policies. After the integration of Türk Telekom, AVEA and TTNET, he served as Core & Transport Network Director.

He served as Türk Telekom International General Manager between December 2016 and August 2018. Since August 2018, Yusuf Kıraç is serving as Assistant General Manager of Technology (CTO) at Türk Telekom; leading in areas such as the Company's fiber and digital transformation architecture; transition to next generation wireless access networks such as LTE A, Wifiv6, 5G; NFV, SDN, IMS, product and channel singularization, service and network optimization, and cyber security. Yusuf Kıraç also serves as Board Member of ESB (Access Providers Association), Board Member of NETSIA Company, Türk Telekom Group Company, headquartered in USA, Board Member of Innova A.Ş and Türk Telekom Youth and Sports Club Chairman.

Emre Şehsuvaroğlu

In 1993, after graduation from Marmara University Business Administration (English), Mr. Şehsuvaroğlu started his professional career as an auditor in Deloitte financial services company. He took part in the audit and consulting projects of various clients across sectors for a period of 10 years until 2003.

He joined Arkas Holding in 2003, where he led the restructuring of Holding’s internal audit function and the auditing of agency, marine and land transport, port and logistics service businesses. He established the auditing processes in overseas locations of Arkas including Spain, Ukraine and Algeria.

Following his role in Arkas Holding, he joined Turkcell by late 2006, where he led the Sarbanes Oxley- SOX compliance efforts of the company as per the the listing requirements in the New York Stock Exchange.  Apart from Internal Audit, he led Enterprise Risk Management, Information Security and Business Continuity Programs until the end of his employment in Turkcell in late 2011. During this period, he was also the acting CFO in Turkcell’s Ukraine subsidiary Lifecell simultaneously for a year.

In late 2011, he joined Yıldız Holding and restructured the existing Internal Audit functions of national and regional companies of the holding in accordance with the International Standards of Internal Auditing. Following that, he started the global auditing processes of global operations of the holding subsidiaries Godiva and United Biscuits. He led these efforts by establishing local audit teams based in New York and Shangai to support existing team in Istanbul.

In October 2018, he left Yıldız Holding and assumed the role of Chief Compliance Officer of Netaş. During this tenure, he executed the adoption, monitoring and management of business processes in Netaş as per the best practice standards of compliance.

Emre Şehsuvaroğlu is serving as Head of Internal Audit since September 2020.

Mehmet Emre Vural

After receiving bachelor’s degree in Electrics & Electronics Engineering from Turkish Military Academy in 1990, Mehmet Emre Vural, completed Artillery and Rocketry school in 1991.

He started his career in Kraft Foods Turkey (formerly Kar Gıda A.Ş.) in 1994 responsible for Human Resources, Administration, IT and Legal functions where he successively took chief, manager and coordinator positions. In 2002 he joined Ülker Group and served as HR Manager, Recruitment Manager, HR Business Partner, HR Director responsible for International Operations and Yıldız Holding HR Director. After joining Matlı A.Ş. in 2012 as General Manager and board member; he took CEO position in Destek Holding starting from 2014.

Through his career, he completed numerous re-organizations, renovation, implementation and launch projects.

Mr. Vural is serving as Human Resources Assistant General Manager since December 2019.

Yavuz Yıldırım

Yavuz Yıldırım graduated from Uludağ University in 1999 from the Faculty of Economics and Administrative Sciences, Department of Business Administration. Following his past work experiences in trading, he started his career in 2002 at Telsim, followed by various positions in sales and marketing units at Nortel Networks Netaş between 2004 -2006 and then Vodafone between 2006-2009). Mr. Yıldırım joined Türk Telekom in 2009 as Director of SME Sales Operations and contributed to the establishment of SME sales channel. In November 2011, he undertook the Wholesale Sales Director role and served as the President of Türk Telekom Wholesale Clients Business Unit between April 2015 - December 2016.

Mr. Yıldırım is serving as Wholesale Assistant General Manager since December 2016.

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