By train from Paris
From station Paris Gare de Lyon, Châtelet-les-Halles, or Paris Gare du Nord, take RER line D, in the direction of Melun or Corbeil-Essonnes. This line has multiple branches, take care to pick a train whose name has a P as its third letter, for instance: RUPE, ROPO, ZUPE, etc.
Exit the train at station Évry-Courcouronnes.
Then, exit the station through the gate that is located at the head of the train, in the direction of Parking Régional, Paul Sabatier. From here, follow the steps below or this track on Google maps:
Leave the train station through exit “Paul Sabatier”
Turn right when going out of the train station
Photo: Google maps
Turn left at the crossing, heading towards the huge mural painting
Photo: Google maps
Turn left after the building with the painting
Photo: Google maps
After the left turn, it is straight forward for 8-10 minutes
Photo: Google maps
Cross the road and continue straight forward
Photo: Google maps
Continue straight forward under the trees, following the red pavement
Photo: Google maps
While following the red pavement, we can see IBISC building on the left
Photo: Google maps
Turn left before the crossing
Photo: Google maps
Continue over the train bridge towards the building
Photo: Google maps
Follow the building towards its entrance
Photo: Google maps
Building main entrance
Photo: Google maps
By car
The simplest solution is to point your GPS to IBGBI, Institut de Biologie Génétique et Bioinformatique located at 48.62572269672865, 2.4400910971834135
The entrance for cars is on the left-side of the building, through a path visible here on the right:
Photo: Google maps
At the end of the road, use the intercom to request the opening of the car park.