Nancy Guillen is Emeritus Research Director at CNRS, Institut Pasteur, France. She is a microbiologist, interested in genetics and in the regulation of gene expression of microorganisms, first in bacteriology and then in parasitology.

Until 2015 she has headed a unit working on cell and molecular biology aspects of Entamoeba histolytica pathogenesis at the Pasteur Institute in France. Nancy Guillen is experienced in molecular biology and in cell biology of unicellular organisms.

For the last 5 years her projects have combined cell biology, physics and mathematics in collaborations with physicists from the Pasteur and Curie Institutes. She has coordinated 14 grants notably two NORD-SUD projects, the European grant Phagoamoeba, Pasteur-Weizmann Research Council, several grant from the National Founding Agency, ANR, ECOS_NORD, European ERA-NET “AMOEBAC”.

She is in charge of the cell biology section in the French National Laboratory of Excellence supporting Parasitology (Labex ParaFrap) and director of the Post Doctorants program in this Labex. Nancy Guillen has been member of the Scientific Council of the Pasteur Institute (Until 2011) and of the Scientific Council in the Animal Health Department-INRA, France (acting) and Co-Director of the Cell Biology and Infection Department, Institut Pasteur until 2014.