Public International Law


Arnold & Porter's Public International Law practice is led by a team of former senior US government and international organization officials with exceptional international law experience. These include a former US State Department Legal Adviser (the senior international lawyer in the US government), a former Deputy Legal Adviser, a former Assistant Legal Adviser who later served as General Counsel of the Central Intelligence Agency, a former Assistant Legal Adviser who now heads our International Arbitration practice, and a former US Executive Director of the World Bank. Our lawyers are well-known and respected by senior government officials and public international law professionals worldwide.

We advise countries, multinational corporations, and individuals on some of the most challenging and sensitive matters of international law and foreign affairs. The variety and depth of our senior leadership enable us to provide service to clients on innovative and complex issues of first impression. Our attorneys' extensive and high-level government experience makes us especially well-attuned to the internal, budgetary, and political concerns of foreign governments, in addition to the needs of our top-level corporate clients.

We bring to our sovereign and private sector clients deep and practical experience on topics spanning all aspects of public international law, such as treaty negotiations, ratification, and implementation; laws relating to the immunity of sovereigns and governmental agencies, instrumentalities, and officials; dispute settlement proceedings (both government-to-government and investor-state); international trade and investment matters; the law and practice of international financial institutions; law enforcement cooperation; and numerous other issues.

Our attorneys have negotiated treaties and other international agreements with countries around the world and in international organizations on numerous topics, including:

  • International Trade
  • International Investment
  • Law of Armed Conflict
  • International Financial Transactions
  • Intellectual Property
  • Border Disputes
  • Telecommunications
  • International Aviation
  • Law Enforcement Cooperation
  • Human Rights and Refugees
  • Taxation

Our lawyers have also represented governments before international tribunals, including the International Court of Justice, and a wide array of arbitration tribunals and panels.


Chambers Global
Public International Law (Global-wide) (2010-2018)
The Legal 500 UK
Dispute Resolution: Public International Law (2015-2017)

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