Marion Guillou (born 17 September 1954 in Marseille, France) is a French scientist specialized in global food security.

She put in place interdisciplinary meta-programs, for instance on integrated plant protection and consumer practices.

The creation of a new research center on interfaces between biology and engineering sciences was decided and financed and the organization of the Ecole Polytechnique was reformed.

Guillou founded the Joint Programming Initiative on agriculture and climate change [4] with British colleagues and chaired it during the first three years(2010-2013).

This initiative, FACCEJPI, now gathers 21 European countries and links at international level with AGMIP and CCAFS.