William Sullivan

Associate

Washington, DC

Will is an associate in the Washington, DC office. He has advised clients in the energy, finance, food, manufacturing, software, and telecommunications sectors in treaty and international commercial arbitrations conducted under AAA, ICC, ICSID, JAMS, LCIA, and UNCITRAL rules as well as in enforcement proceedings in United States courts.

Will studied classics at Princeton, law at Yale, and legal history at the University of Chicago, where he received a PhD. Immediately before joining Three Crowns, Will held the Raoul Berger-Mark DeWolfe Howe Fellowship at Harvard Law School and taught Roman law at Boston College Law School. He previously served as a law clerk for Judge José A. Cabranes of the United States Court of Appeals for the Second Circuit and, before graduate school, taught classical languages at Phillips Exeter Academy in Exeter, NH.

Will’s publications on legal subjects include The Restricted Charitable Gift as Third-Party-Beneficiary Contract, 52 Real Prop., Tr. & Est. L.J. 79 (2017) and the co-edited volume The Discovery of the Fact (Clifford Ando & William P. Sullivan eds., 2020).

Will is admitted in the District of Columbia and holds an attestation de réussite à l’examen de contrôle des connaissances in French law allowing bar registration in France. He speaks or reads English, French, German, and Italian.

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Bar and court admissions

District of Columbia

New Jersey

Languages

English

French

German

Italian

  • Representing an energy major in an investment treaty arbitration involving a denial of justice

  • Representing an East Asian high technology manufacturer in an ICC arbitration applying New York contract law

  • Representing a West Indian energy concern against claims of breach of a New York law contract and statutory torts in a PCA-administered UNCITRAL rules arbitration

  • Representing an artificial intelligence software maker in a JAMS arbitration arising out of a suite of Delaware law contracts with an investor and involving claims of breach of contract, breach of statutory duty, and tort

  • Representing a Canadian energy company against Ontario law contract claims brought by its political risk insurer in an ad hoc UNCITRAL arbitration

  • Representing a renewable energy technology manufacturer in an ICC arbitration arising under a patent cross-license agreement governed by Illinois law

  • Representing a large financial services firm in an LCIA arbitration applying New York law

  • Filing amicus curiae briefs on the law of forum non conveniens in the United States Court of Appeals for the Second Circuit

  • AB, Princeton University
  • MA, University of Chicago
  • JD, Yale Law School
  • PhD, University of Chicago
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