The Greek GEO Office (GGO) has been operating at the National Observatory of Athens since 2007, under the supervision of the Greek General Secretariat of Research and Technology (GSRT). It is the main representative of Greece in the Intergovernmental Initiative of the UN named GEO (Group on Earth Observation) and the national contact point for Earth Observation. Its operation focuses on the coordinated and effective participation of Greece in the global and regional activities of GEO and its purpose is to maximize synergies between the main partners of Earth Observation in Greece, involving different communities of users, stakeholders and industry. Additionally, GGO seeks to communicate relevant funding opportunities, catalyzing the creation and networking of the national Earth Observation community. To these ends, GGO is active in various GEO working groups, in organizing regional workshops, as well as in participating in regional initiatives in which it assumes a connecting and coordinating role, while promoting the principles of open exchange of data, information and knowledge.