Katelyn A. Horne

Katelyn Horne advises sovereign States, State-owned entities, private companies, and prominent individuals in relation to international arbitration, public international law, and other disputes. She represents sovereign States in investment treaty arbitrations concerning a variety of industries and economic sectors, including national infrastructure, oil and natural gas, banking and financial institutions, and intellectual property. She also provides counsel to sovereign States with respect to maritime boundaries and entitlements, sovereign immunity, and international human rights law; represents private entities in international commercial disputes; and advises individuals on issues of sovereign and diplomatic immunity. Her experience includes disputes brought before international tribunals (administered by various arbitral institutions), the International Court of Justice, the United Nations Human Rights Committee, and the United Nations Working Group on Arbitrary Detention. She also has experience in US litigation.

Prior to joining the firm, Ms. Horne served as an associate legal officer to His Excellency Judge Hisashi Owada of the International Court of Justice in The Hague. She received the David M. Berger Memorial Prize in International Law and was a member of Columbia Law School's two-time national championship Jessup International Law Moot Court team. Ms. Horne previously served in the Executive Branch of the US Government, including as a political appointee at the US Department of Homeland Security and in positions at the White House, the US Department of State, and the Office of the US Trade Representative.