The NCCR is based in the World Trade Institute, Bern. The WTI is close to the main station (SBB CFF) and can easily be reached by using the elevators at the back of the station leading to the University (Grosse Schanze). Exit the train platform and head towards the elevators that are close to track 12. Get off on the 3rd Floor (you are in a parking lot). Take a right out of the elevators and walk down a corridor towards the exit. Keep walking straight through the bikes and go right on the street in front of you. Walk up the hill until you reach Hallerstrasse and turn right (there is a cafe on the corner). It should take you less than 5 minutes.
Alternatively, you can take bus Nr. 12 and exit at “Universität” (two stops from main station). Hallerstrasse is the next street on the right.