We are located in the Bio Science Park in Leiden, on the ground floor of the CHDR building, close to Leiden Central Station and the Leiden University Medical Center.

By air: There is a frequent rail service from Schiphol Airport to Leiden. This is considerably more convenient than by car. Trains leave every 15 minutes in the direction Leiden-Den Haag-Rotterdam.

By car:

From the A4 motorway: Take intersection 'Zoeterwoude Dorp/Leiden'. Follow route number N206 for approximately 6 kilometers through Leiden-Zuid. Follow the signs 'Centrum-Leiderdorp' and directly after that 'Bio-Science Park'. After about 100 meters turn right into the Zernikedreef.

From the A44 motorway: Take intersection 'Leiden', route N206, Utrecht. Follow the signs 'Centrum' and after that 'Bio-Science Park'. After about 100 meters turn right into the Zernikedreef.

By train: lt is a 15 minute walk from Leiden Central railway station to Promasys. Railway timetables can be found here. Alternatively there are taxis available at the station. lt is possible to obtain combined train-taxi tickets. This should be indicated when buying a train ticket. Bus nr 43 (The Hague) leaves from the Leiden Central Station to a busstop opposite to Promasys on the Zernikedreef.