Graduated from the Istanbul University School of Law. Attended graduate studies at Harvard Law School and received an LL.M. degree from Harvard in 1960. In 1962 and 1963 attended the Faculté Internationale pour l’Enseignement de Droit Comparé in Strasbourg. Studied also in Max-Planck Institut für Auslaendisches-und Internationales Privatrecht in Hamburg (1964-1965).

Professor Özsunay is the author of several books, including the Introduction to Civil Law, Legal Status of Persons, Legal Entities, Introduction to Comparative Law and Cartel Law.

He represented Turkey at the Diplomatic Conferences for the Convention on Agency in International Sale of Goods in Geneva (1983); the Convention on the Law Applicable to Contracts for the International Sale of Goods at the Hague (1985); and the Convention on International Factoring and Financial Leasing in Ottawa (1988).

Professor Özsunay is also active as an international arbitrator in commercial disputes mostly as an ICC arbitrator.

Professor Özsunay serves at present as the Turkish delegate in the CDBI of the Council of Europe (Strasbourg); in the UNCITRAL Working Groups II (Arbitration) and VI (Security Interests) and in the Commission on Competition and Commission on E- Business, Telecoms and IT (EBITT) at the ICC as the representative of the Turkish National Committee to ICC.

Professor Özsunay has been practicing in several fields of law (e.g. corporations, foreign investments, international business law, intellectual and industrial property law, cartel and competition law, medical law, product liability law, enforcement of foreign judgments etc.)