The EuroGOOS office is located at 29 rue Vautier, 1000 Brussels, hosted by the Royal Belgian Institute of Natural Sciences (also hosting the Museum of Natural Sciences). The Institute/Museum is located in the European quarters of Brussels close to the European Parliament and Leopold park.
How to find the venue: You will find information about how to get to the Institute/Museum hosting EuroGOOS here. The below document gives more detailed recommendations on how to find the EuroGOOS office and some suggestions on how to select a suitable hotel location:
When you arrive at Brussels International Airport in Zaventem: Frequent trains leave the airport going to/through the Brussels stations (Central, South, North, Luxembourg). The airport train station is situated at level-1. You can find train schedules and public transport options in English here. Taxis are available on the Arrivals level.