Graduated from Marmara University, Faculty of Economics and Administrative Sciences in 1990, Nihat Narin studied an MBA at London Middlesex University and completed a course in Internal Audit at Louisiana State University. At the same time, he holds Advanced Turkish Capital Markets and Corporate Governance licenses.
Working in various Investment Banks in London and Istanbul as a Telecom and Internet Analyst between 1990 and 2000, Narin also has extensive experience in corporate finance, corporate restructuring and public offerings fields.
Narin joined Turkcell in 2000 and managed the company to be listed on the New York Stock Exchange, public offering and company restructuring processes. Throughout his 19 years, he performed respectively as ‘Director of Investor Relations’, ‘Turkcell’s Director of Internal Audit’, ‘Director of Business Development and M&A ’, ‘CEO of Global Tower – Turkcell’s infrastructure subsidiary’.
Narin restructured base stations and tower infrastructure areas in countries such as Ukraine, Belarus, Cyprus and Turkey where Global Tower operates. He developed and started its activities on ‘Base station and Tower Consolidation Model’ which prevents repeated investments by inciting the sector in sharing fiber and tower.
He analyzed several applications of the Smart City project abroad and initiated to implement it in Turkey.
He developed the business model and carried out leading projects supporting the infrastructure of the GSM sector, particularly the new generation ‘Low Orbit Satellite System’.
Narin has been a member of Turkcell Corporate Governance Committee, Inteltek Board of Directors, Ukrtower Board of Directors and TUYID. He is married and has 2 children.
Oguz Hakan Kivci
Deputy Genaral Manager
Electronic Systems Manager (By Att.)
Born in 1972 and graduated from Kayseri High School, Oguz Hakan KIVCI completed his undergraduate studies in 1998 in the Department of Electrical and Electronics Engineering, Eastern Mediterranean University.
He later continued his further education by participating in Data Analytics, Finance and Marketing training programs at various universities overseas through mini (MBA) program of Koc University. Currently, Mr. Kivci attends the Executive Master of Business Administration (eMBA) program at Bahcesehir University.
Throughout his career, Mr. Kivci has undertaken key roles in national/international companies operating in telecommunication, information technologies and electronics sectors and taken the lead vision projects and corporate transformation processes as a specialist in business development, marketing-sales and technical management.
Beginning his career in 1998 initially as a field engineer at a private company, Mr. Kivci later continued his career serving in various positions as Network Planning, Communications Service Engineer and Sales Manager, Service Director at Telsim (Vodafone), Siemens, Nokia, Huawei and Turkcell, respectively. He has undertaken active roles in various executive level positions in the overseas offices of Siemens.
Serving as an executive in Eastern Anatolia Universal-Wimax project of the Ministry of Transport as well as in the fibre line project between Turkey (Mersin) – Northern Cyprus, Kivci received a number of award degrees for his achievements in corporate operations.
Mr. Kivci was involved in Turkey restructuring processes of HUAWEI technological company and completed his services, receiving a number of awards of achievement, as the Service Sales and Service Support Directors between 2009-2016.
Working on investor relations between 2016-2017, Mr. Kivci served as Sales and Business Development Manager at Turkcell Global Tower and International Wholesale Departments between 2017-2019.
Starting to work at ISTTELKOM Inc. in October 2019, Mr. Kivci continues to serve as Deputy General Manager.
Holding a number of certificates for sectoral ad occupational courses and programs, Oguz Hakan Kivci has a good command of English and beginner level Spanish. He is married with 3 children.
Born in Eskişehir, Esin ZEYTİNOĞLU graduated from Süleyman Çakır High School.
She received her bachelor’s degree from Anadolu University, Faculty of Economics and Administrative Sciences, Department of Business Administration in 1995.
Working in various companies in the finance sector, she served as Specialist (1994-1998), Chief (1999-2006), Manager (2006-2011) and Finance Director-CFO (2011-2017).
Zeytinoğlu held a Financial Advisor position between 2018 and 2019, and finally, in December 2019, was appointed Financial Manager of İSTTELKOM Inc., which she still holds office.
Esin Zeytinoğlu speaks English.
Born in 1974 in Amasya, Yalcin KARATAS completed his undergraduate studies in 1995 in the Department of Electrical and Electronics Engineering, Yildiz Technical University.
Beginning his career initially as an R&D Engineer in the private sector in 1996, Karatas were involved in a number of national and international projects as a specialist and technical manager in various positions at Siemens and Nokia-Siemens between 2000-2008. Serving as the Head of Technical Department and Financial Management Manager at Huawei between 2010-2017, Karatas led several major projects in the fields of business development, technical marketing and sales. He worked as the Sales&Marketing Manager at Andasis between 2018-2019.
Beginning to serve at ISTTELKOM Inc. in March 2020, Karatas continues to work as the Trade Manager.
Holding a number of certificates for sectoral and occupational courses and programs, Karatas has a good command of English. He is married with 1 child.
Human Resources Manager
Aylin TOMAÇOĞLU was born in Istanbul in 1980. After graduating from İntaş High School, she received her undergraduate degree from Marmara University Management Faculty.
Tomaçoğlu worked in Human Resources departments of various institutions and acted as Human Resources Executive between 2001 and 2005, Human Resources Specialist at Tosb-Taysad between 2006 and 2007, Human Resources Supervisor at Agk Sigorta between 2008 and 2011, Human Resources Manager at Çalışkan Lojistik, Kimya ve İnşaat Group company between 2011 and 2012, Human Resources Manager at Kuehne Nagel company between 2013 and 2017, and Human Resources Manager at Medkon Lines company between 2017 and 2020.
Tomaçoğlu was assigned as Human Resources Manager at İSTTELKOM Inc. in December 2020, a duty that she continues to fulfil.
Aylin Tomaçoğlu speaks English.
Information Technologies Manager
He was born in Istanbul in 1976. Having graduated from Yeşilköy 50. Yıl High School, he received his bachelor’s degree from Yıldız Technical University, Electrical and Electronics Engineering Department in 1997. He got his master’s degree in Business Administration (MBA) from Yeditepe University in 2004.
Between 1997 and 2000, he worked as Project Manager in an international company operating in the industrial automation sector. Between 2000 and 2015, he started working as the department manager at ETC Inc., an active company in the telecommunications sector, and continued to serve therein as General Manager and member of the Board of Directors of the group companies. He performed duty as a senior executive at the IT companies of Çukurova Holding between 2015 and 2017. He functioned, between 2017 and 2019, as the General Manager of Telda Inc., which operates in the sectors of telecommunication and information technologies. As of November 2019, Taner Çıtak has been appointed as the Information Technologies Manager of İSTTELKOM Inc.
Taner Çıtak speaks English and is married with one daughter.
Huseyin Avni Buyuk
Infrastructural Systems Manager
Huseyin Avni BUYUK was born in Rize in 1972. Having graduated from Rize High School, Mr. Buyuk graduated from the department of Civil Engineering, Faculty of Civil Engineering at Yildiz Technical University in 1995.
He worked as the construction site manager in various projects in the private sector between 1995-1998. He began to serve as the project engineer at ISBAK AS on October 01, 1998. He worked as the chief of Realization, Signalization, Transportation Systems Manufacturing, Project Implementation, and Signalization systems manufacturing chief at ISBAK AS between 2001-2016, respectively. On December, 2016, he was appointed as ISTTELKOM AS Infrastructural Systems Director. Currently serving in this position, Mr. Buyuk is married with 3 children.