Burak Orhun embarked on his professional journey as a Financial Analyst at Mercedes-Benz Türk A.Ş. He later continued his career in the United States, where he held various executive and management roles at leading organizations, such as Finance Manager at Thomson Corporation/Reuters, Director of Portfolio Management and Director of Corporate Development at Capital One Financial, and CFO at CadenceQuest, Inc.

In 2009, Mr. Orhun joined OYAK Group in Turkey. As General Manager of OYAK Girişim Danışmanlığı A.Ş, he led all M&A and new investment initiatives until 2018. During this period, he also held executive board member, and chairman positions at group's chemical and energy companies in Turkey and abroad.

Mr. Orhun joined Sabancı Group in 2019 as Head of Strategy and Business Development. He served as Head of the Building Materials Group at Sabancı Holding from May 2021 to April 2024, and then assumed the role of Head of the Material Technologies Group in April 2024. During this period, he also served as Chairman of the Board at Kordsa, Brisa, Akçansa, Çimsa, Çimsa Building Solutions BV, and Afyon Çimento.

With Sabancı Holding’s new organizational structure, Burak Orhun was appointed as President of Strategic Investments in January 2026. In addition to this role, he continues to serve as Chairman of the Board at Kordsa and Brisa, and as a Board Member at Akçansa, Çimsa and Afyon Çimento.

Burak Orhun holds a Bachelor’s degree in Economics from Boğaziçi University, a Master’s degree in Finance from George Washington University, and an MBA from the Wharton School, University of Pennsylvania.

Orhun Köstem joined Anadolu Group in 1994, where he held several management roles until 2008. He was appointed as the CFO of Efes Breweries International in 2008. A year later, in 2009, he transitioned to the role of Corporate Finance Coordinator within the Anadolu Group.

From 2010 to 2018, Mr. Köstem furthered his career at Coca-Cola İçecek, serving as the CFO between 2010 and 2016 and then as the Regional Director for the Middle East and Pakistan. He was the CFO of Anadolu Efes between 2019 and 2021.

Since July 1, 2021, Mr. Köstem has been the Group CFO of Sabancı Holding. In addition to his primary role, he holds significant positions across various organizations: Vice Chairman of Sabancı İklim Teknolojileri and Member of the Board of Directors at Akbank, Kordsa, Enerjisa Enerji, Enerjisa Üretim and Dx Technology Services and Investment B.V.

He was one of the co-authors of the book "Opening the Window to Capital Markets: From A to Z Initial Public Offerings and Investor Relations.", published in 2009. His expertise has been recognized for many years by various national and international platforms; while listing among "Türkiye’s Most Influential 50 CFOs" by BMI Business School and DataExpert in 2016, 2019, 2020, and 2021, he also received accolades as Türkiye’s Best CFO in Thomson Reuters Extel's Investor Relations Awards in 2011 and 2013, and was named “Best CFO” in the Consumer Sector in Emerging EMEA by Institutional Investor (II) in 2020. He was also distinguished by the Best CFO among industrials in the Emerging EMEA region for four consecutive years from 2022 to 2025 by II (renamed as Extel as of 2024). In addition, he was recognised as Best CFO among BIST30 companies by Turkish IR Society (TUYID) in 2022 and 2023.

Mr. Köstem, featured in the C-Suite Series - Fortune 50 CFO 2026 list, is a member of the CFA Society Istanbul and the CFO Network of the World Business Council for Sustainable Development (WBCSD), reflecting his commitment to excellence in finance and sustainable development.

In 1991, Orhun Köstem completed his undergraduate studies in Mechanical Engineering at Middle East Technical University (METU) , where he also obtained his MBA. Furthering his education, he acquired a master's degree in Finance and Corporate Law from Bilgi University.

Yeşim Özlale Önen began her professional journey in 1999 as an Associate Consultant at Davranış Bilimleri Enstitüsü. Her career trajectory took a new direction in 2003 when she joined Deloitte as a Senior Consultant, a position she held until 2005. In her role at Deloitte, she provided expert consultancy services in Human Resources through leveraging her background in psychology. From 2005 to 2007, Mrs. Önen served as Project Manager at DDI Türkiye, where she managed various projects on human resources and organizational development, contributing to her growing expertise. In 2007, Mrs. Önen's career path led her to Sabancı Holding, where she assumed the role of Group Human Resources Manager. Her tenure at Sabancı Group lasted until 2011, during which she played a key role in shaping the human resources strategies and practices within the group. Mrs. Önen joined Korn Ferry in 2011 and. served as Senior Client Partner from 2018 to March 2023 where she led various projects in Türkiye and EMEA. Yeşim Özlale Önen is the Group President for Sabancı Holding Human Capital and Sustainability and Chief Diversity and Inclusion Officer since March 2023. Mrs. Önen completed her secondary education at İzmir Amerikan Lisesi in 1993, followed by a bachelor’s degree in psychology from Middle East Technical University in 1997, and a master’s degree in clinical psychology in 1999. She is an ICF accredited executive coach.

Tolga Kaan Doğancıoğlu graduated from Ankara Anadolu High School and earned his bachelor’s degree in Mechanical Engineering from Middle East Technical University (METU). Doğancıoğlu began his professional career at ASELSAN, and subsequently held active roles in national and international projects at ENKA Teknik and Ford Otosan. During this period, he completed the Executive and MBA programs at Koç University.

In 2005, Doğancıoğlu founded the engineering and design firm Hexagon Studio, serving as the company’s General Manager for 12 years. In December 2017, he joined the Sabancı Group as Director of Projects and Business Development for the Industrial Group, and in July 2018, he was appointed Director of Construction and Business Development at Kordsa. He later served as CEO at TEMSA.

With over 30 years of leadership experience in mobility, advanced materials, sustainable energy, and climate technologies, Doğancıoğlu currently serves as Group President of Strategic Investments and Operations at Sabancı Holding, while also continuing his role as Chairman of the Board and CEO of Sabancı Climate Technologies Inc. He is also Chairman of the Board at Temsa Skoda Sabancı Transportation Vehicles Inc.

He is married and has two children. He is fluent in English and German.

Ebru Dogruol received a BS degree in Industrial Engineering from Bogazici University in 1992 and completed an MBA degree at Koc University in 2001. She joined Pfizer in 1994 and assumed several global leadership roles with increasing responsibilities following her roles in the Turkish organization, including sales, marketing, strategic planning, business development, and finance. From 2009 onwards, she has taken on regional (Emerging Markets, China, International Developed Markets) and global marketing responsibilities across a diverse set of therapy areas and lifecycle stages by establishing and managing complex virtual organizations, defining go-to-market strategies, transforming business models, leading launches, and business development and growth initiatives. In 2018, she moved to the vaccines group and took global responsibilities for several brands, including the COVID-19 vaccine launch. In 2021, she has assumed the Commercial VP Vaccines in EM and China, followed by Global Vaccines Strategy VP role in 2024. She is currently the Transformation Lead covering 33 countries as of 2026.

Ebru had started her career as a manufacturing engineer in Netas in 1992. Ebru has been elected as an Independent Member of the Board of Directors of Kordsa Teknik Tekstil A.Ş. on 23.03.2022 and continues her role. She is also an Independent Member of the Board of Directors of Kale Seramik A.Ş and advisor to healthtech start-ups. Ebru is a member of the Advisory Board of the Industrial Engineering Department at Bogazici University. She is an executive coach and mentor, advocates for education of children and equal opportunities for women.

After graduating as an Electronics and Communication Engineer from Istanbul Technical University, Mehmet Mesut Ada worked as an engineer at four different companies in Ankara between 1975 and 1980. In 1980, he joined KORDSA as a maintenance engineer and subsequently held the roles of Maintenance Manager and then Production Director. In 1987, he was appointed as Project Manager at DUSA (a joint venture between DUPONT and SABANCI).

In 1991, he transferred to DUPONT (Netherlands), where he served as Production Manager for two years. In 1993, he returned to DUSA as Plant Manager and a member of the Board of Directors.

In 2002, he was appointed as Plant Manager at SASA (Adana), and in 2005, he became General Manager of SASA and Operations Director at ADVANSA, overseeing operations in the UK, Germany, and Turkey.

In 2006, he was assigned as General Manager of Kordsa’s plant in Chattanooga, USA.

Between 2009 and 2011, he served as General Manager of Interkordsa in Germany.

In 2012, he was appointed Operations Director for South America (Brazil and Argentina) and retired in 2014.

From 2015 to June 2025, he served as a member of the Board of Directors at PT Indo Kordsa Tbk, Indonesia.

Mesut was elected to the position of Independent Board Member of Kordsa Teknik Tekstil A.Ş. on April 14, 2025, and continues to serve in this role.