DR. ADA BOGLIOLO PIANCASTELLI SIQUEIRA focuses on international trade disputes and public international law. She counsels sovereign States and corporations on state to state disputes and other disputes where one or more sovereigns are involved.
Recent engagements include:
- The State of Qatar (Qatar) in international litigation arising out of neighboring countries’ campaign of coercive economic measures against Qatar. Ada was part of the Sidley team that successfully represented Qatar in both offensive and defensive proceedings in the World Trade Organization (WTO). In one case, Qatar became the first complainant in the 70-plus-year history of the multilateral trade rules to defeat a respondent’s invocation of the WTO’s national security exception.
- Advising sovereign clients on e-commerce legislation in light of developments at the WTO.
- Advising sovereign clients on the establishment of free-trade zones and commerce corridors.
- Advising states on potential international issues in public international law under the Vienna Convention on the Law of Treaties and Draft articles on Responsibility of States.
Prior to joining Sidley, Ada worked with Geneva-based organizations focused on the intersection between international trade and sustainability. She has worked on a broad range of international law issues for institutions such as the International Centre for Trade and Sustainable Development and the World Trade Institute. She also worked as an intern at the Appellate Body of the WTO, providing the Appellate Body with research assistance on various aspects of WTO law.
While completing her master’s and doctoral degrees in international law, Ada has taught a series of courses on international public law and international trade law, as well as trade law and development. Ada supervised students in the TradeLab International Economic Law Clinic and competed in the regional and final rounds of the John H. Jackson Moot Court Competition on WTO law, winning awards for international semifinalist and honorable mention for her achievement as an oralist. Ada has coached teams and acted as a panelist for the John H. Jackson Moot Court Competition for the past five years.
Ada has also served as an editor for the Journal of International Economic Law for Oxford University Press and international trade law from 2015 to 2017. She worked as a Brazilian National Research Council (CNPq) researcher and acted as an honorary Fellow at the Institute of International Economic Law at Georgetown Law.
Ada defended her doctoral thesis in 2018 on novel ways of understanding trade-related policy space for domestic regulations in the context of transnational economic networks and alternative development strategies.
She regularly writes and publishes on international law issues including public international law, human rights, and trade and development.
**Not Admitted To Practice Law**