Having graduated with a high degree from the Economics and Political Science department of Rutgers University in 1981, Neslihan Tonbul completed her post-graduate study on International Finances and Economic Development at The Fletcher School of Law and Diplomacy – Tufts University. Appointed to the senior executive positions at New York, London and Istanbul agencies of variousinternational finance institutions (The Irving Trust Company, The Bank of New York and BNY Mellon) from 1983 to 2008, she was appointed as regional manager overseeing a region that includes the Middle East, Africa, Eastern Europe and Turkey. Serving as board member to the prominent Turkish holdings since 2008, Neslihan Tonbul is a board member of Petkim, Alarko Holding and Vakıfbank International. Gaining expertise in the Management of Family Companies by studying at the Harvard Business School with CFEG, Tonbul has been teaching “Management of Family Companies” at the Faculty of Economics and Administrative Sciences of Koç University since 2017. Neslihan Tonbul is an independent board member of Tofaş since 2018. Serving as senior advisor at New Zealand Trade and Enterprise (NZTE) since 2014. Neslihan Tonbul is proficient in English, French, and Azerbaijani.

Yağız Eyüboğlu graduated from Boğaziçi University with BA degree in Economics in 1991, he earned his MBA from Koç University in 1996. He started his professional life as a Management Trainee at Arçelik A.Ş. in 1991. In 1993, he was promoted to Koç Holding Headquarters, where he worked for more than 10 years, as Senior Internal Auditor, Assistant Financial Coordinator and Financial Coordinator, respectively.

Between 2004 and 2009, Eyüboğlu assumed several responsibilities within the Koç Group, namely, CFO of Arçelik A.Ş., CEO and Board Member of Beko Elektronik A.Ş., Assistant to the President of the Koç Holding Foreign Trade and Tourism Group, and Human Resources Director of Koç Holding. In 2009 he joined Aygaz A.Ş. where he served as the C.E.O. of the company until October 2015. Following his assignment to Koç Holding as the Deputy President of Energy Group in October 2015, he is now serving as the President of Energy Group at Koç Holding since April 2016.

Serving as Board Member at several companies of Koç Conglomerate, Eyüboğlu also carries out the positions of President of World LPG Association (WLPGA), President of the Board of Trustees of Turkish Family Health and Planning Foundation (TAPV), Board Member of International Competitive Research Institution. He has started to serve as a Member of the Board of Directors of Aygaz A.Ş. in 2016.

Gökhan Dizemen’s professional career started in 2002 as an Associate and later Senior Associate at Pricewaterhouse Coopers and continued as Assistant Manager in 2006. After serving as Finance Manager at Societe Generale Consumer Finance in 2007, he joined Koç Holding A.Ş. where he worked as Finance Manager (2008-2010) and Finance Coordinator (2011-2018). He later served as Chief Financial Officer at Tüpraş Trading Ltd. (2018-2020) Gökhan Dizemen has been appointed Assistant General Manager, Finance at Aygaz A.Ş. as of January 2021.