Päivi Leino-Sandberg LL.D., LL.M. (with distinction, London School of Economics) is Professor of Transnational European Law, University of Helsinki and Director of its Master's Programme in Global Governance Law. She is Deputy Director of the Erik Castrén Institute of International Law and Human Rights where she currently leads or acts as PI for three international research projects (Norface SepaRope, Norface Indigo and 2035LEGITIMACY). Her main research interests relate to EU decision making, the use of legal and other expertise and questions of democratic governance. She specializes in EU institutional and constitutional law, with a main focus on European administrative law, EMU and EU external relations, publishing in leading academic outlets in her field, and frequently engages in multidisciplinary work. She has previously worked as Academy of Finland Research Fellow and Professor of International and European Law at UEF Law School. In addition, she has held various visiting positions including at the European University Institute, NYU Law School, Humboldt University Berlin and the iCourts Centre of Excellence at the University of Copenhagen. Before returning full time to the academia in 2015, she worked for over 10 years as a legal adviser for the Finnish government participating in numerous EU and international negotiations and Court cases. Her new books, a monograph entitled The Politics of Legal Expertise in EU Policymaking and a collection of essays, co-edited with Emilia Korkea-aho on Law, Legal Expertise and EU Policymaking, were  published by Cambridge University Press (2021, 2022).