Karen Fassi Wilbur is an associate at Wordstone Dispute Resolution in Washington, D.C., where she focuses on international arbitration and dispute resolution. Her background spans investor-state and international commercial arbitration, public international law, and anti-corruption compliance, with roles in both the private sector and international organizations in the United States and France.

Karen has experience in proceedings conducted under a range of institutional rules, including ICSID, ICC, LCIA, and AAA-ICDR, across disputes in the construction and engineering, energy and natural resources, agribusiness, and telecommunications sectors.

Before joining Wordstone Dispute Resolution, Karen worked as a law clerk in the international arbitration practice group of a leading US law firm. Earlier in her career, she served as a consultant with the World Bank Group’s Integrity Vice Presidency and as a judicial intern to a federal judge at the U.S. District Court for the District of Maryland. She also completed legal internships with the Organization of American States, a French multinational energy company, and a Brazilian law firm in France

Karen is an advocate for international legal community-building. She co-founded and was the first President of the Georgetown Brazilian Law Association (BrazLA) and serves on the organizing committee of the annual Doing Business in Brazil Legal Symposium at Georgetown Law. She is also an active member of several professional organizations, including Young ICSID, the American Society  of International Law, and the Special Committee on Mercosur-EU Relations of the Rio de Janeiro Section of the Brazilian Bar Association.

Georgetown University Law Center, Master of Laws in International Legal Studies (Certificate in International Arbitration and Dispute Resolution; Notes Advisor, Georgetown Journal of International Law (GJIL)), 2022

The Hague Academy of International Law, Winter Courses on International Law (Certificate), 2021

Sorbonne Law School, Master of Laws in General International Law, 2019

Paris 1 Panthéon-Sorbonne University, Bachelor of Laws, Economics and Management (Certificate in European and International Law), 2017

São Paulo State University (UNESP), Completed 60 credits toward Bachelor of International Relations (Researcher and Writer, The Defence and International Security Studies Group (GEDES) at the Brazilian Foreign Policy Observatory; Volunteer interpreter, NGO Green Cross International at the UN Conference on Sustainable Development “Rio+20” (Rio de Janeiro, Brazil), 2013

New York (pending admission)

Portuguese, French, English, Spanish (working knowledge)

What Happens After Arbitration? SCOTUS Removes Jurisdictional Hurdle for Post-Arbitration Motions, Wordstone Insights, May 2026

Federal Court Authority After Arbitration: Jurisdictional Limits and Practical Impact, Wordstone Insights, May 2026

Is Mandatory Arbitration at Risk in the “Last Mile”? Wordstone Insights, April 2026

Translation  from French into Portuguese of Boden, Didier. « ‘Erga-’ : Contribution sémantique et lexicale à une étude unifiée des relations entre ordre juridiques », Revue critique de droit international privé. 2021, pp. 5-42. (Translation forthcoming in Brazilian legal journal)

• Merit Scholarship Recipient, Georgetown Law
• Former President & Co-Founder of the Georgetown Brazilian Law Association (BrazLA)
• Organizing Committee Member of Doing Business in Brazil Legal Symposium (DBB) at Georgetown Law
• Annual Meeting Committee Member of the American Society of International Law
• Member of Young ICSID
• Member of Young ICCA
• Member of Young ITA