Nathalie Bernasconi-Osterwalder, LL.M, is a senior international lawyer and heads the Economic Law & Policy programme of the International Institute on Sustainable Development (IISD). She is also the Executive Director of IISD Europe. Nathalie has extensive legal, policy, and training experience in the area of international trade, investment, sustainable development, human rights, international environmental law and arbitration.

She previously worked as an attorney at the Center for International Environmental Law in Washington and Geneva, where she also managed the office. Earlier, she was a fellow at the International Institute of International Economic Law at Georgetown University Law Center and worked in Hanoi, Vietnam, for a legal reform project of the United Nations Development Programme (UNDP) and for the Australian law firm Phillips Fox. In Switzerland, Nathalie is admitted to the Bar of Basel and has worked for the Justice Department, Berne, in the Section for International Law.