Getting to the INRA Jouy-en-Josas from Paris by train takes approximately 1h but it is wise to check the train schedule. Take either the RER B to Massy-Palaiseau or the train/RER to "Gare de Versailles Chantiers". Then, take the RER C to Jouy-en-Josas. As an alternative, it is also possible to go from Paris to Jouy-en-Josas without connection (RER C). When in Jouy-en-Josas the simplest option is walking to the campus (a few minutes see map). It then takes another few minutes to get to MaIAGE's building (number 233 on the map).