Brian Bombassaro practices in sovereign finance, foreign investment arbitration, and international trade. His experience includes advocacy in dispute settlement on behalf of sovereign governments and international investors, as well as advising governments and investment fund managers on financial transactions and investments.

In his sovereign finance practice, Mr. Bombassaro has advised sovereign governments, sub-sovereign governments, and a foreign central bank on the negotiation and execution of various financial agreements, including capital markets instruments, credit agreements, and financial services agreements. He also has advised investment fund managers on the terms and enforcement of financial agreements involving sovereign debtors and guarantors.

In foreign investment arbitrations, Mr. Bombassaro has served as counsel to sovereign governments and international investors in matters of foreign investment law and dispute resolution. His practice in this area centers on advocacy in the interpretation and application of investment treaties, often before the World Bank's International Centre for Settlement of Investment Disputes (ICSID), and has included arbitration relating to the interpretation and application of tax treaties.

In his international trade practice, Mr. Bombassaro has advised clients on WTO agreements and US international trade laws applicable to trade in goods and services. Prior to joining Arnold & Porter, as a legal intern with the Office of the US Trade Representative, he participated in 10 dispute settlement proceedings at the WTO and in multilateral negotiations to improve and clarify the WTO Dispute Settlement Understanding.

Mr. Bombassaro graduated from Yale Law School, where he served on the Yale Law Journal and was awarded the William T. Ketcham, Jr. Prize for the best paper in private international law. At the Harvard Kennedy School, he earned a Master in Public Policy (International Trade & Finance), and he holds BSBA and BA degrees from the University of Florida. Mr. Bombassaro lectures annually at Yale Law School and Georgetown Law School on international law topics.

Mr. Bombassaro is fluent in Portuguese and Spanish, and he practices in each language. He serves on the firm's pro bono immigration committee, co-leading the U Visa Adjustment of Status program.


  • Federative Republic of Brazil, Republic of El Salvador, Republic of Panama, and a West African Government in preparation of international capital markets offerings and liability management transactions.
  • Foreign Central Bank in negotiation of agreements with other central banks for provision of currency swaps in response to balance of payments pressures.
  • US and UK Investment Fund Managers on developments in litigation in US federal courts over Argentine sovereign bonds in default.
  • US and UK Investment Fund Managers on debt obligations of the Austrian province of Carinthia, Commonwealth of Puerto Rico, and Republic of Ecuador.
  • Government of Hungary and the Republic of Panama in preparation and filing of 18-K annual reports with the US Securities and Exchange Commission.
  • Governments of three Brazilian States in negotiation of credit agreements with international banks.


  • JD, Yale Law School, 2012
  • MPP, Harvard Kennedy School, 2008
  • BSBA, BA, University of Florida, 2006
  • District of Columbia
  • Guest Lecturer, Yale Law School

  • Guest Lecturer, Georgetown Law School

  • Portuguese
  • Spanish

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