Nancy Guillen is an Emeritus Research Director at the National Center for Scientific Research and a Guest Researcher at Institut Pasteur. She is a microbiologist with research interests in infection, regulation of microbial gene expression, bacteriology, and parasitology. She was a Professor at Simon Bolivar University, Venezuela (1979-1980), an Assistant Professor at Paris Sud University, France (1980-1981), and a Research Fellow at The Public Health Research Institute in New York, USA (1987). Since 1981, she has been a Research Fellow at the CNRS in France. She served as the Head of Cell Biology of Parasitism Unit at Institut Pasteur from 2001 to 2015, Chair of Cell Biology Section and Post-Doctoral Program at the French National Laboratory of Excellence supporting Parasitology (LParaFrap), a member of the Scientific Council at Pasteur Institute in 2011 (Vice-President), and the Scientific Council in Animal Health Department-INRA from 2006 to 2016. She also served as the Coordinator of Pasteur-Weizmann Council (2008-2013) and Co-Director of Cell Biology and Infection Department at Institut Pasteur from 2010 to 2014. E-mail: nguillen@pasteur.fr ORCID: 0000-0001-6551-9012 Web1: https://research.pasteur.fr/en/member/nancy-guillen/Web2: https://www.researchgate.net/profile/Nancy-Guillen-4