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Senior Management

Ümit Önal

Ümit Önal was graduated from Faculty of Communication of İstanbul University in 1995. Having started his Professional life in media and communication sector, Önal joined Turkuvaz Media Group in 2007 and served as the General Manager of ATV, Advertisement Group VP and Executive Committee Member respectively until 2015.

After being appointed as the CEO and Member of the Board of Directors of Digitürk in 2015, Ümit managed the sale process of Digitürk to BeIN group successfully.

After joining to Türk Telekom family at the end of 2016, Ümit Önal took over the Sales and Customer Care Assistant General Manager position between 2016 and 2018. He has been serving as the Marketing and Customer Care Assistant General Manager since December 2018.

In 2019, Ümit Önal has led the record number of revenue and EBITDA performance which has been delivered since the IPO of Türk Telekom.

As of 31st of July 2019, Ümit Önal has been appointed as the CEO of Türk Telekom, the leader telecommunication and technology company of Turkey and he has been working with a vision to spearhead the digital and technological transformation of Turkey.

Having more than 20 years of experience in Media and Communication sector, Ümit Önal had the chance to be a part of the media transformation process of Turkey and he has actively taken positions in national and international associations throughout his career. Previously he served as the Chairman of TİAK (TV Monitoring and Research Committee) and currently Mr. Önal is actively the Chairman of m-TOD (Mobile Telecommunications Operators Association), Board Member of RVD (Advertisers Association), Member of YASED (Foreign Investors Association) and US Business Council Member of DEİK (Foreign Economic Relations Board). Additionally, he is representing Türk Telekom at world GSM Association and TVYD (Association of TV Broadcasters).​​​

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 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, Mr. 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 marketing team of Nestle Turkey in 2000, he worked at Nestle as CPW Turkey Country Manager, Regional Marketing Director for Central Asia based in Uzbekistan, Marketing Director 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 Beverages (NESCAFE) Strategic Business Unit. Mr. Bütün returned to Turkey in 2015 and was appointed as the General Manager of Nestle Turkey Beverages Group and also as a Board Member of Nestle Turkey.

In January 2016, he joined Turkcell as Senior Vice President of Retail Sales responsible from consumer sales and was 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 Consumer Sales Assistant General Manager 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.

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 accompanied two titles so far.

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

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 Succesfull 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 Karakkullukçu 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 ONF (Open Networking Foundation), Board Member of Innova A.Ş and Türk Telekom Youth and Sports Club Chairman.​

Yavuz Türkmen

Yavuz Türkmen started to study Economics on a scholarship at Bilkent University in 1995 and graduated with a degree. He worked at Türk Hava Yolları between 2004 and 2006 as Financial Control Manager, afterwards in 2006 he worked at a private company as Vice General Manager of Finance and Administrative Affairs. He joined Türk Telekom in 2007 as General Accounting Manager. Between 2009 –2017, he served as Türk Telekom Financial Control Director and Türk Telekom Group Financial Control Director. During this period, he took an active role in reorganization of finance department and also took responsibility of many projects, each of which first in their fields. Yavuz Türkmen has CPA and Independent Auditor certificates.

Yavuz Türkmen is serving as Head of Internal Audit since February 2017.​

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 Gida 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.​

Uğur Nabi Yalçın

Uğur Nabi Yalçın is graduated from Istanbul University Faculty of Law, and started his career in 1997 at Migros Turk T.A.Ş. as lawyer. He worked at BDO Denet Yönetim Danışmanlığı Şirketi, a sworn accounting and independent auditing firm, between 1998 and 2007 as lawyer and legal counsel. He worked as chief legal counsel in Aktif Yatırım Bankası A.Ş. between 2007 and 2015. He practices law as solo practitioner since 2015. Mr. Yalçın was appointed as board member in various companies throughout his legal career.​​

Uğur Nabi Yalçın is serving as Legal and Regulation Assistant General Manager at Türk Telekom 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 Netas 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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