Dr. Frutos-Peterson’s practice focuses on arbitration, international law and international investment law, where she works primarily with governments and state entities. She has represented foreign states in investor-state arbitrations under the arbitration rules of the International Centre for Settlement of Investment Disputes (ICSID) and the United Nations Commission on International Trade Law (UNCITRAL). She has also acted for private companies in international commercial arbitration under the Singapore International Arbitration Centre (SIAC) and the ICC International Court of Arbitration. Dr. Frutos-Peterson has also acted as an arbitrator under the ICC Arbitration Rules and the Rules of the Centro de Conciliación y Arbitraje (CeCAP) of Panama. While at ICSID from 2001 to 2009, Dr. Frutos-Peterson served as Secretary of Tribunals in numerous arbitral proceedings brought under the ICSID Convention and the ICSID Additional Facility Mechanism, based on bilateral and multilateral investment treaties.

As an Adjunct Professor at the American University Washington College of Law in Washington D.C., Dr. Frutos-Peterson lectures on international commercial arbitration and investor-state arbitration. She is also a frequent speaker at conferences and seminars in the United States and abroad and the author of the book L’émergence de l’arbitrage commercial international en Amérique latine: l’efficacité de son droit, published by L’Harmattan.