Marja-Liisa Öberg is Associate Professor (docent) of EU Law at Lund University and Director of the Master's Programme in European Economic Law. She holds a PhD from the European University Institute, LL.M. degrees from the European University Institute and Utrecht University, and a Bachelor's degree in Law from the University of Tartu.

Her research lies broadly within EU constitutional law, EU internal market law and EU external relations law. She is particularly interested in how European integration reshapes legal and political relationships within and beyond the European Union. Her work examines the constitutional limits of integration, the influence of third countries on EU law and policy-making, and the changing boundaries of the European legal order. Her current research addresses questions concerning cross-border regions, family relationships, core-periphery dynamics, and the role of anticipation in European integration.

She is Principal Investigator of the Riksbankens Jubileumsfond-funded project Conceptualising Cross-Border Regions in the European Union's Legal Order: From Covidfencing to Constitutionalisation (2023-2025) and coordinates Lund University's participation in the Erasmus+ Jean Monnet Network EU-VALUES (2024-2026). She is the founder and coordinator of the Faculty of Law's Interdisciplinary Research Working Group, co-coordinates the Global Europe & International Cooperation (GEIC) Research Group at the Centre for Modern European Studies (CEMES), and has co-led the Pufendorf Institute Advanced Study Group (Un-)Natural Borders: Multidisciplinary Perspectives on the Boundaries of European Integration (2024). 

Marja-Liisa is the author of the Cambridge University Press monograph The Boundaries of the EU Internal Market: Participation without Membership (2020), co-editor of the Journal of Common Market Studies Special Issue European Integration Outside-In: Third Country Influence on EU Law and Policy Making (2023, with Sandra Lavenex), and co-editor of the Cambridge University Press volume The Family in EU Law (2024, with Alina Tryfonidou). Her research has been published in leading international journals, including the Common Market Law Review, Journal of Common Market Studies, European Public Law, and Legal Issues of Economic Integration, as well as in edited volumes published by Cambridge University Press, Hart Publishing, and Routledge.

Her research has been supported by the Ragnar Söderberg Foundation, Riksbankens Jubileumsfond, the European Commission, and the Centre for European Studies at Lund University. She is a member of the Steering Committee of the Swedish Network for European Legal Studies (SNELS) and regularly serves as reviewer for leading international journals, publishers, and national research councils.

At Lund University, Marja-Liisa teaches and supervises students at undergraduate, Master's and doctoral level across the broad field of EU law. Her teaching spans EU constitutional and institutional law, the internal market, EU external relations, and the relationship between EU law and international law. She has previously taught at Örebro University, Stockholm University, Uppsala University, Umeå University, the University of Passau, and the University of Cyprus.