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Cemal Sedat Dayıoğlu

Cemal Sedat Dayıoğlu was born in 1959, in Istanbul.

Having completed his primary education at Macka Primary School and his high school studies at Terakki Foundation Private Sisli Terakki High School, Cemal Sedat Dayıoğlu pursued a part of his graduate studies in France.

He studied French Philology at Besançon University, Faculty of Literature prior to his LLB studies at Strasbourg University, Faculty of Law. Later on, he completed his LLB studies at Istanbul University Faculty of Law and he graduated from Istanbul University Faculty of Law in 1985.

Admitted to the Istanbul Bar under 14288 bar member number, Cemal Sedat Dayıoğlu actively practices law at his own law firm, DAYIOĞLU LAW FIRM & INTERNATIONAL ADR CENTER, of which he is the managing partner, since 1986.

He provides legal consulting services in French and in English.

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ADR Expert

In 2017, having completed his Mediation Certification Course in Labour Law, Cemal Sedat Dayıoğlu became mediator admitted to the List of Mediators of the Mediation Department of the Turkish Minsitry of Justice, under 4120 mediator number. In the same year, he founded a Mediation Center. As General Accredited Mediator and Certified Employment-Law Mediator he provides efficient and speedy resolution to employment law disputes and business-related disputes.

Extracurricular Activities

Alongside his career, Cemal Sedat Dayıoğlu engages in social activities. He is the founder and the Vice President of the Foundation Gulten Dayıoğlu Children’s and Young Adult Literature. He happens to be founder and member of many associations and foundations such as Toothfriendly Association, Lions Aksaray, Sisli Police Services Development and Support Association, Yesilyurt Sports Club, Galatasaray Solidarity Foundation, Sisli Terakki Alumni Association, Istanbul University Alumni Association and Turkish Travellers Club. For two years he served as Board Member and Vice President of Sariyer Sports Club. In addition, since 1999, Cemal Sedat Dayıoğlu is member of Galatasaray Sports Club.

During presidential elections in 2018, he is nominated as Full Board Member Candidate in the group of the Presidential Candidate Ali Fatinoglu. In 2021, he is nominated as Full Board Member Candidate in the group of the Presidential Candidate Ibrahim Ozdemir.

Other Achievements

Among his hobbies there are motor sports, diving, surfing, yachting and skiing. Cemal Sedat Dayıoğlu won the first prize in 1995 Erzurum Dedeman Alpine Competition, the first and second prize in 1976 and 1977 French Universities Giant Slalom, nineth prize in 1987 Bodrum World Surfing Championship.

Oya Dayıoğlu

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Oya Dayıoğlu was born in 1960, in Bolu, Gerede.

Having completed her primary education in Istanbul, her middle and high school education at Saint Benoît Private French High School, she studied LLB at Istanbul University Faculty of Law and graduted from Istanbul University in 1984.

Admitted to the Istanbul Bar under 14097 bar member number, Oya Dayıoğlu practices law at DAYIOĞLU LAW FIRM & INTERNATIONAL ADR CENTER as Partner, since 1985.

She speaks French and English.

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Ece Dayıoğlu, MCIArb, MSIArb

Ece Dayıoğlu, MCIArb, MSIArb was born in 1991, in Istanbul.

She completed her primary education at Fevziye Mektepleri Foundation Private Nisantasi Isik Primary School and her high school education at Notre Dame de Sion French High School.

Having completed her LLB at Galatasaray University Faculty of Law, she graduated from Galatasaray University in 2014. She did her legal internship at DAYIOğLU LAW FIRM & INTERNATIONAL ADR CENTER.

In the same year, Ece Dayıoğlu, MCIArb, MSIArb studied LLM in Business Law at Istanbul Bilgi University. Meanwhile she completed her legal internship and suspended her LLM studies before completing her thesis in order to pursue her LLM studies in Paris.

In 2016, Ece Dayıoğlu, MCIArb, MSIArb studied LLM in International Dispute Resolution and Economics Law at Queen Mary University of London during which she engaged in her dissertation on enforceability of arbitral awards in international investment arbitration involving state parties. She graduated from Queen Mary University of London in 2017.


In 2017, Ece Dayıoğlu, MCIArb, MSIArb studied Master II in Arbitration and International Commercial Law at Sorbonne University, followed by an arbitration internship at the International Chamber of Commerce ICC International Court of Arbitration. She graduated from Sorbonne University in 2017.

During her internship at the ICC, working with the Middle East and North Africa – MENA regional case management team, Ece Dayıoğlu, MCIArb, MSIArb undertook duties with respect to various arbitration cases and performed tasks such as appointment of arbitrators and scrutiny of the draft awards, she gained experience and developped insight on the ICC Arbitration and its practical aspects. She did a profound research on the grounds for arbitrator challenge and replacement as well as related Court decisions using the ICC database.

Ece Dayıoğlu, MCIArb, MSIArb attended certification courses on CIArb Introduction to International Arbitration, ICC Annual Summer Course on International Commercial Arbitration and ICC Online Dispute Resolution.

Sworn translator in English and in French, Ece Dayıoğlu, MCIArb, MSIArb carried out simultaneous interpretation during an ICC Arbitration hearing and performed witness examination.


Admitted to the Istanbul Bar under 52543 member number since December 2015, Ece Dayıoğlu, MCIArb, MSIArb got sworn in to the Paris Bar in November 2017, since then she provides legal consulting and legal representation services in Turkey and in France.

She practices law at DAYIOĞLU LAW FIRM & INTERNATIONAL ADR CENTER since 2018.

Ece Dayıoğlu, MCIArb, MSIArb is arbitrator accredited by Chartered Insititute of Arbitrators – CIArb and Singapore Institute of Arbitrators – SIArb.

Ece Dayıoğlu, MCIArb, MSIArb is member of Chartered Insititute of Arbitrators (CIArb), Singapore Institute of Arbitrators (SIArb), Paris Bar, Istanbul Bar, Galatasaray Sports Club, Galatasaray University Alumni Association, Notre Dame de Sion Alumni Association, Queen Mary Alumni Network, Sorbonne Alumni, Union of Former Students of French Schools in Turkey, Turkish-French Chamber of Commerce in Turkey Association, ArbitralWomen, ICC YAF, Young ISTAC, CCBE, IBA, ELSA, Young ICCA and Young ArbitralWomen Practitioners.

Since 2016, Ece Dayıoğlu, MCIArb, MSIArb is the Advisor of the Board of Trustees of the Gulten Dayıoğlu Child and Adolescent Literature Foundation. Since 2021, she takes part in elected management of Galatasaray University Alumni Association as well as in Queen Mary University of London CCLS Turkey Chapter Committee.

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  • Perihan Sokak No: 4 Şişli, Istanbul

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