Shearman & Sterling LLP multinational law firm headquartered in New York City, United States.

Yas Banifatemi is a partner and Co-Head of the International Arbitration practice. She also leads the firm’s Public International Law practice, and co-heads the firm’s Energy practice.

She is widely recognized as one of the most prominent international arbitration and public international law specialists worldwide. She advises and represents States, State-owned entities and companies on both public international law and international arbitration issues. She acts as both counsel and arbitrator in arbitrations conducted pursuant to the ICSID, UNCITRAL, ICC, LCIA, SCC, SIAC, HKIAC, CRCICA, DIS and the Swiss Arbitration Rules, with particular focus on investment protection, oil & gas and general commercial matters.

Yas is a Vice-President of the ICC International Court of Arbitration, a member of the LCIA Court and a member of the SIAC Court of Arbitration. She is also a member of the ICSID Panel of Arbitrators, appointed by the Chairman of ICSID’s Administrative Council.

She has been repeatedly praised in all leading professional directories and earns “acclaim for her excellent track record in arbitration”. Directories have described her as being “truly outstanding”, a “star performer”, a “brilliant lawyer with a sharp intellect”, an “excellent practitioner” and “one of the best technicians in the international investment arbitration field”, also having “a considerable presence in public international law”. Chambers Global notes that “Yas Banifatemi is emphatically described by clients as ‘an outstanding lawyer in every possible respect’.” Clients have commented on the “clarity of her opinions”, her “ability to give valuable strategic advice, while forming a strong impression of her experience and ability to anticipate how cases will develop”, her “real grasp of detail”, describing her as “extremely effective”, “incredibly impressive all round” and a “reliable and robust advocate” having a “thorough understanding of the law she practices”. Clients also highlight her “strong cross-examination skills”.  Among the many professional rankings in which she features, she was praised in an article highlighting “The Best and the Brightest” 45 female lawyers under 45 worldwide, published in July 2011 by The American Lawyer.

Yas Banifatemi teaches at Harvard Law School, Yale Law School and Panthéon-Sorbonne University. In the Summer 2019, she gave a course at The Hague Academy of International Law on the powers of the arbitrator. She researches in the areas of public international law and international arbitration, and has authored numerous publications in, and regularly speaks about, both these fields.