Board of Directors Executive Committee

Hakan Gürdal

Chairman

Hakan Gürdal, who completed his undergraduate studies in Mechanical Engineering at Yıldız Technical University and earned his master’s degree in International Business at Istanbul University, began his professional career at Çanakkale Çimento in 1992.

Hakan Gürdal embarked on his professional career in 1992 at Çanakkale Çimento. In 1996, he joined Akçansa as Head of Strategy and Business Development and later assumed a number of senior leadership roles, serving as Vice General Manager of Trade, Ready-Mix Concrete & Aggregates and Procurement. Gürdal was appointed General Manager of Akçansa on 1 August 2008, later served as Head of Cement Group at Sabancı Holding from September 2014 to October 2015. He was appointed to the Managing Board of Heidelberg Materials on 1 february 2016 and was responsible for the Africa–Eastern Mediterranean Group area from April 2016. In January 2024, he also assumed responsibility for Kazakhstan and Russia and he continues his role as a Member of the Managing Board responsible for the Africa– Mediterranean–Western Asia Region

As of June 18, 2026, Hakan Gürdal has assumed the position of Chairman of the Board of Directors of Akçansa.

LEADER

Christian Mikli

Vice Chairman

René Aldach

Board Member

Bülent Bozdoğan

Board Member (Independent)

Ali Aynacı

Board Member (Independent)

Tayfun Öneş

Board Member

DIRECTORS

René Aldach

Board Member

René Aldach completed his studies in Business Administration at the Westfälische-Wilhelms-Universität Münster with a university diploma degree in Business Administration. René Aldach started his career at Heidelberg Materials in 2004. In 2015, he was appointed Chief Financial Officer of the Australian joint venture Cement Australia. In 2018, he assumed financial responsibility for the entire Australian country organisation as Chief Financial Officer Hanson and Board Director for Hanson & Cement Australia. Since September 2020, René Aldach has been responsible for the entire accounting, controlling, and reporting of Heidelberg Materials Group as Director Group Reporting, Controlling & Consolidation. Since 1 September 2021, René Aldach has been Chief Financial Officer of Heidelberg Materials. As of January 2024, René Aldach is also responsible for Heidelberg Materials business in Australia.

Bülent Bozdoğan

Board Member (Independent)

Bülent Bozdoğan was born in 1956. After graduating from Middle East Technical University, Department of Business Administration, he joined PwC as a Senior Auditor in 1980. From 1982 to 1991, he worked as a Manager in various commercial and financial departments of Unilever Türkiye. In October 1991, he joined Brisa Bridgestone Tire Co., a joint venture between Sabancı Holding and Bridgestone Japan, as Assistant General Manager in charge of Finance, Planning, and Control. In January 2001, he continued his career as Global CFO and Vice President at KordSA Global A.Ş., a joint venture between DuPont USA and Sabancı Group. In 2009, he started work as the Chief Audit Manager responsible for the auditing of 20 different group companies of Sabancı Holding A.Ş. and managed and coordinated the audit teams of each company. Bülent Bozdoğan retired at the age of 62 in accordance with Sabancı Holding’s internal regulations after 26 years at Sabancı. In January 2018, he took office as the CEO responsible for Mining and Tourism Operations at Dedeman Holding for 2 years and resigned when his term was complete. As of July 2020, he has worked as an Independent Board Member and Head of Auditing at Borusan Mannessman Boru A.Ş., a Turkish-German joint venture, and he still holds this position. In October 2020, he became an Independent Board Member at Kordsa Indonesia, and in September 2021, he became an Independent Board Member at CarrefourSA.

Ali Aynacı

Board Member (Independent)

Ali Aynacı graduated from Boğaziçi University, Faculty of Business Administration. Between 1975 and 1986, Mr. Aynacı held managerial positions in various companies of Sabancı Holding and served as General Manager of Çanakkale Çimento Ticaret A.Ş. between 1986 and 1991, CEO of Rota Liman Hizmetleri A.Ş. between 1991 and 2012, Vice Chairman of the Board of Directors of Star İhracat A.Ş. between 2002 and 2013 and Chairman of the Board of Directors of Seament Dış Ticaret A.Ş. between 2013 and 2015. Ali Aynacı has been the Chairman of the Board of Directors of MERAY Dış Ticaret A.Ş. since 2015..