Cleary Gottlieb Steen & Hamilton LLP

Public International Law Department

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What the team is known for Accomplished international disputes practice attracting big-ticket mandates thanks to its excellent experience in investment treaty arbitration. Also comes highly recommended for its guidance on state immunity, sovereign debt restructuring and international trade law. Stands out for its long-standing experience acting for sovereign states and further commended for its expert advice to corporations and international organisations.

Strengths The lawyers garner strong praise from sources, who are "impressed by the quality of their analysis" and highlight their excellent performance at all levels of seniority, noting: "They have a deep bench of younger lawyers who do an excellent job."

Work highlights Represented the Republic of Tatarstan in an UNCITRAL arbitration against Ukraine under the Russia-Ukraine BIT, in relation to the takeover of the Kremenchug refinery.

Acted for the Republic of Iraq in arbitration proceedings against the Republic of Turkey, which concerned inter-state agreements relating to the use and operation of multiple transnational oil pipelines.

Notable practitioners

Claudia Annacker is a highly accomplished practitioner in the international arbitration sphere. She has a wealth of experience defending sovereign states against high-stakes investment treaty claims. She is lauded as "an impressive counsel" by clients, who also draw attention to her "quick thinking and imposing courtroom presence." She is based in Paris.