Clotilde Théry is Research Director (DR2) at INSERM, working at Institut Curie in Paris (France), where she heads a team entitled “Exosomes and tumor growth”. After a PhD in Paris (France), and a post-doc in Oxford (UK) and Columbia Universities (USA), where she studied the development of the nervous system, she turned to the cell biology aspects of immune responses in 1996 when joining the lab of S. Amigorena, at Institut Curie in Paris. Since 1998, her scientific interests have focused on the study of extracellular vesicles called exosomes, secreted by immune and tumor cells. From 1998 to 2007, she mainly focused on exosomes secreted by dendritic cells of the immune system, and her work demonstrated their nature as specific subcellular compartments and their ability to transfer MHC-peptide complexes between dendritic cells to enhance efficiency of immune responses. Her more recent goals are to understand the physiological functions of exosome secretion during an in vivo immune response, especially during tumor growth. C. Théry organized in January 2011 in Paris an international symposium dedicated to Exosomes (International Workshop on Exosomes), which was at the origin of the subsequent launching of the International Society of Extracellular Vesicles (ISEV) in September 2011. After working as interim vice-President of this society, C. Théry was elected in april 2012 Secretary General of ISEV. She also accepted to act as Editor-in-Chief of the Journal launched by the Society.