Seismology and the observation of earthquakes is one of those scientific disciplines that from its very beginning embraced international collaboration and the free sharing of data and ideas across academic groups and national boundaries. As one of Europe’s leading seismological services, the Swiss Seismological Service (SED) at ETH Zurich has a long history of promoting and engaging in various national and international initiatives. We also collaborate actively with European and international organisations in Seismology. Many SED staff members contribute to the governance of these organizations and take over community duties. The SED, with support from ETH, hosts a number of offices for various international organizations, or acts as their national focal point.