Dr. Claudia Annacker focuses her practice on international arbitration and litigation and public international law matters, in particular investor-State disputes, inter-State disputes, disputes involving international organizations and human rights cases. She has represented states and investors in more than 30 investment treaty arbitrations.
Consistently recognized as a leading lawyer and expert in international arbitration by Chambers and The Legal 500, she is described as “an investment treaty specialist with a phenomenal reputation…profound practical experience and high academic knowledge of international treaty disputes,” a “strategy maestro with a unique and impressive presence in the court room” and “highly respected by tribunals and opposing counsel.” She is also noted for her “second-to-none knowledge of theory of international law and arbitration practice.” Benchmark Litigation named Dr. Annacker “Lawyer of the Year” France (2019), as well as a “Dispute Resolution Star” in international arbitration (2020). Who’s Who Legal has also selected her as a “Thought Leader.” She is listed in The Legal 500 EMEA 2022 “Hall of Fame”.
Dr. Annacker also acts as arbitrator. She was appointed to the ICSID Panel of Arbitrators in 2020.
Dr. Annacker is an adjunct professor at the University of Vienna, where she teaches advanced research seminars in international responsibility and international dispute settlement and has been a visiting professor at the Paris Ouest Nanterre La Défense University. She has published widely in the fields of international arbitration and public international law.
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