Thierry Fichefet was principal investigator in 42 research projects funded by UCL, the Belgian National Fund for Scientific Research, the French Community of Belgium, the Belgian Science Policy Office, several French agencies and the European Commission. He is author or co-author of about 200 scientific papers, most of them published in international peer-reviewed journals or books. He is frequently invited to give talks and chair sessions in international scientific meetings, and to give popular conferences on climate change in schools and societies. Thierry Fichefet is also deeply involved in national and international research programmes, and organizations. In particular, he was member of the Scientific Steering Group of the Climate and Cryosphere (CliC) Programme of the World Climate Research Programme (WCRP) up to 2008 and is the Belgian representative in the International Association for the Physical Sciences of the Oceans (IAPSO). He was Lead Author of the Fourth and Fifth Assessment Reports of Working Group 1 of the Intergovernmental Panel on Climate Change (IPCC), which shared the Nobel Peace Prize 2007 with Al Gore. He is member of the Academia Europaea and was awarded the Adolphe Wetrems Prize 2004 (Mathematical and Physical Sciences) of the "Classe des Sciences de l’Académie Royale des Sciences, des Lettres et des Beaux-arts de Belgique", the Gérard Mégie Prize 2008 of the "Académies des Sciences" of the "Institut de France" and the Louis Agassiz Medal 2016 of the of the Division on Cryospheric Sciences of the European Geosciencesl Union.