Patrick W. Pearsall is the chair of the firm's Public International Law Practice. He is ranked as the second "Most Highly Regarded" arbitration practitioner in the Americas (out of several hundred listed) in the peer-reviewed WWL Arbitration Guide, where he is praised as "an incredible advocate," "whose razor-sharp mind is unmatched" and who is a "leader in public international law and investment treaty arbitration."
Mr. Pearsall has over 15 years of experience representing parties in complex international disputes and served in the US State Department from 2009–2017. He was the chief of investment arbitration from 2015 onward under President Obama and President Trump. He has arbitrated claims involving billions of dollars on behalf of the United States, other sovereign states and private investors in both commercial arbitration and investment arbitration.
On behalf of the United States, he advised on the revision of the International Court of Arbitration’s (ICC) rules and led the negotiations of several bilateral and multilateral treaties, including the investment provisions in the Comprehensive and Progressive Trans-Pacific Partnership, the Transatlantic Trade & Investment Partnership, and the US-China Bilateral Investment Treaty. Mr. Pearsall is recognized as one of the foremost experts on NAFTA and USMCA investment and is recommended by The Legal 500.
Mr. Pearsall has received several awards and has worked for both the ICC and for the Honorable Sonia Sotomayor on the United States Court of Appeals. He is an adjunct professor at Georgetown University Law Center where he teaches courses on international courts and investment arbitration. Prior to this appointment, he taught at Columbia Law School, Harvard Law School and Yale Law School.
A member of several arbitral institutions, he is also an appointed member of the Hong Kong International Arbitration Centre’s List of Arbitrators.