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Okan Demirkan

Work +902123559900
Kolcuoglu Demirkan Koçakli

Work Department

Energy, Dispute Resolution, Compliance.



Mr. Demirkan has significant experience in energy and infrastructure, arbitration and litigation. Between 2004 and 2010, Mr Demirkan was heavily involved in all legal issues surrounding the Baku- Tbilisi-Ceyhan Crude Oil Pipeline Project (BTC), where he played a key role in regulatory, real estate and litigation issues. In addition to BTC, Mr Demirkan has advised clients in connection with the Nabucco Gas Pipeline and the Samsun-Ceyhan Oil Pipeline. In 2011, Mr Demirkan took an active role in the Shah Deniz Stage 2 Natural Gas Pipeline Project, where he led the KDK team advising on the project’s legal structure in Turkey, including intergovernmental agreements, Turkey’s natural gas market legislation and on related commercial and public international law matters. Between January and June 2012, Mr Demirkan led the KDK team in the firm’s key role in the Trans-Anatolian Natural Gas Pipeline Project (TANAP). In this multibillion dollar project, the KDK team drafted the Host Government Agreement and negotiated it with the Turkish Government, along with the Intergovernmental Agreement, which was signed in late June 2012 and ratified in March 2013. 

Mr Demirkan has also been heavily involved in several institutional as well as ad hoc arbitration proceedings, concerning disputes arising from major infrastructure projects including build-operate-transfer (BOT) model investments, share purchase agreements, shareholders agreements, asset transfer agreements and licensing contracts. 

He also serves as an arbitrator for various commercial disputes involving Turkish law, and from time to time he is appointed as expert witness in Turkish law matters, in both arbitration as well as litigation proceedings. In addition to international arbitration, Mr Demirkan represents clients in their local litigation proceedings, including commercial, civil and administrative lawsuits. 

In recent years, Mr Demirkan and KDK’s disputes team have also become involved in sports law matters. The firm successfully represented Galatasaray before FIFA in a major dispute with one of its former players. The result was a great victory for the club, and earned KDK a remarkable place in Turkey’s sports law arena. The KDK team has also become increasingly more involved in commercial arbitration, with an impressive record in enforcement of foreign arbitral awards.

Okan Demirkan is a prominent figure in the area of compliance and ethics. He has led the KDK team in several investigations related to various regulatory as well as anti-bribery / anti-corruption allegations. He is an active Board member of the Turkish Ethics and Reputation Society.


After spending ten years at a major Istanbul-based law firm, Mr Demirkan joined Kolcuoğlu Law Firm in 2010. He currently leads the firm’s energy, dispute resolution and compliance practices.

He is a co-author of ‘Turkish and International Legislation and Treaties on the Security of Critical Energy Infrastructure’ Vol 5 of the ‘Critical Energy Infrastructure Security Project Final Report’ published by the International Strategic Research Organization (2012). In 2013, 2014 and in 2017 again, Mr Demirkan was awarded the client choice award by the International Law Office for his work on energy and natural resources projects.


English, Turkish.


Istanbul Bar Association; International Bar Association (IBA); Association of International Petroleum Negotiators (AIPN); Turkish – British Chamber of Commerce and Industry (TBCCI); ICC Turkey; Young International Arbitrators Group (YIAG); Turkish Corporate Governance Association; International Nuclear Law Association (INLA); Board Member of Turkish International Nuclear Law Association (INLA) Turkey; Galatasaray Sports Club Association; Board Member of Ethics and Reputation Society (TEID); Audit Board Member of Yenibirlider (A New Leader) Association


University of Sussex School of Legal Studies (LLB, 2000); Rijnlands Lyceum, Leiden – The Netherlands (International Baccalaureate, 1997)



Within: Leading individuals

Okan Demirkan - Kolcuoglu Demirkan Koçakli

Within: Compliance

Kolcuoglu Demirkan Koçakli is adept at handling compliance matters relating to anti-corruption, anti-bribery, governance, regulatory, investigations litigation and data protection. It is acting for all of Hugo Boss’ Turkish subsidiaries in relation to compliance with data protection legislation and day-to-day employment and corporate law matters. Other clients include Duracell, Marubeni Corporation and Marsh & McLennan Companies. Okan Demirkan heads the team.

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Dispute resolution

Within: Leading individuals

Okan Demirkan - Kolcuoglu Demirkan Koçakli

Within: Dispute resolution

Kolcuoglu Demirkan Koçakli represents clients in commercial disputes, enforcement lawsuits, labour claims, international arbitration and post-arbitration proceedings, ADR, litigation and compliance investigations. It successfully represented SSI Schäfer Automation in the Court of Appeals in relation to the enforcement of a €1m ICC arbitration award. Clients include Roxcel Handelsgesellschaft, Hinduja Bank, Hugo Boss and Agence France-Presse. Practice head Okan Demirkan possesses 'energy, excellent expertise and a convincing courtroom presence'.

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Within: Employment

Kolcuoglu Demirkan Koçakli handles the full range of employment law issues including labour unions law and collective bargaining agreements, occupational health and safety, social security, tax, foreign employee work permits and litigation. The team is headed by Okan Demirkan and Serhan Kocaklı and counsel Maral Minasyan, who provides ‘solution-driven advice’. Clients include Hugo Boss, Magneti Marelli, Philip Morris and Agence-France Presse.

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Within: Leading individuals

Okan Demirkan - Kolcuoglu Demirkan Koçakli

Within: Energy

Kolcuoglu Demirkan Koçakli acts for clients in the electricity, natural gas, petroleum, LPG, renewable and nuclear energy industries. Areas of expertise include oil import, wholesale, storage and export activities, greenfield investments, regulatory advice, licensing and permitting matters. It also deals with arbitration, M&A and corporate issues. Clients include Vitol, BP and Turcas Petrol. The ‘very professional, knowledgeable and client-oriented team’ is headed by the ‘responsive and punctual’ Okan Demirkan.

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