Pedro J. Martinez-Fraga is a leading practitioner in the field of investor-State international arbitration, international commercial arbitration, and transnational litigation, including complex jurisdictional disputes concerning common law and civil law issues. Mr. Martinez-Fraga is a World Bank (International Bank for Reconstruction and Development) arbitrator. On December 16, 2015, President Barack Obama appointed Mr. Martinez-Fraga as one of four U.S. delegate members to the Panel of Conciliators of the International Centre for Settlement of Investment Disputes (World Bank), effective February 23, 2016. He is the first Hispanic to have been so appointed in the history of the Washington Convention of 1965. In April 2021, the Curatorium of The Hague Academy of International Law bestowed on Mr. Martinez-Fraga the prestigious distinction of inviting him to teach a special course during the Private International Law Session in the Summer of 2023.

Mr. Martinez-Fraga has represented the Republic of Argentina, the Republic of Guatemala, the Republic of El Salvador, the Federated Republic of Brazil, the Republic of Chile, the Republic of Ecuador, instrumentalities of the Kingdom of Spain, and most recently the Dominican Republic. He has, in addition, served as an arbitrator in International Chamber of Commerce (ICC) and International Centre for Settlement of Investment Disputes (ICSID) (World Bank) proceedings: (Urbaser S.A.  and Consorcio de Aguas Bilbao Bizkaia, Bilbao Bizkaia Ur Partzuergoa v. Argentine Republic (ICSID Case No. ARB/07/26). His arbitration experience includes arbitral disputes under the following institutions and rules: ICSID (World Bank), ICC, LCIA, ICDR, DIS and the Hong Kong International Arbitration Center.

His more notable representations include serving as lead US counsel on behalf of the Republic of Chile in the case against former Chilean President, Commander-in-Chief of the Armed Forces and Senator pour vie Augusto Pinochet. Mr. Martinez-Fraga also maintains an active international human rights practice, serving as lead counsel in a landmark case before the Inter-American Commission on Human Rights. He served as a member of the Center for Human Rights Advisory Council of the American Bar Association.

A noted scholar, author and lecturer in the fields of public and private international law, Mr. Martinez-Fraga has been published in 15 countries and five languages. He has written more than 50 peer-reviewed or academically reviewed  articles, six books on private and public procedural international law and is the co-editor and a contributing author of a seventh book on international arbitration. Four of his books are published by Cambridge University Press and form part of every major academic law library and legal research center globally.

Mr. Martinez-Fraga has lectured at more than 30 universities globally including Harvard University, Columbia University, Cornell University, New York University (NYU), Georgetown University, McGill University, Bucerius Law  School (Hamburg, Germany), University of Roma Tre (Rome, Italy), Leibniz Universität (Hannover, Germany), the Chinese Academy of Social Sciences (Beijing), East China University (Shanghai), Central University of Law and Social Science (Beijing), Marmara University (Istanbul), Bilgi University (Istanbul), Istanbul Kültür University, The University of Florence, Universidad de Alcalá de Henares, Pepperdine University Caruso School of Law, King's College London, Istanbul University, the Universidad Complutense de Madrid (University of Madrid), and Özyeğin University (Istanbul, Turkey). He currently serves as an Adjunct Professor at the New York University (NYU) School of Law and a Distinguished Visiting Practitioner of NYU Center for Transnational Litigation, Arbitration, and Commercial Law.

On August 27, 2007, Mr. Martinez-Fraga was listed as counsel who may be appointed to represent victims or the accused in cases before the International Criminal Court at The Hague.