Gabrielle is Senior Counsellor in the Research Division (ERSD) of the WTO Secretariat, where she has worked since May 2020. In September 1994 Mrs Marceau joined the GATT Secretariat and for several years her main function was to advise panellists in WTO disputes, the Director-General's Office, the Secretariat and WTO Members on WTO-related matters. From September 2005 to January 2010, Gabrielle was legal advisor in the Cabinet of former WTO Director-General Pascal Lamy and from September 2016 to January 2017, she was acting director, Officer in Charge for the Legal Affairs Division. Gabrielle is also Associate Professor at the Law Faculty of the University of Geneva. She has been Visiting Professor at the Graduate Institute in Geneva, the Sorbonne in Paris, Monash University in Melbourne, the World Trade Institute in Bern, and many other institutions. Gabrielle is also involved with associations and groups promoting international (economic) law. She has published extensively in WTO law and international economic law. Before joining the GATT/WTO, Gabrielle worked in private practice in Quebec, mainly in civil, insurance and labour law.