The EGT-TWINN project aims to enhance research and technical capacity at the Geological Survey of Estonia (EGT) to accelerate Estonia transition from fossil fuel energy to green energy. The capacity building will be mainly focused on developing state-of-the-art geological, geochemical and geophysical survey skills, data management workflows, and subsurface modelling capability for exploration and geological resource assessment of European critical raw materials and geothermal energy as a future potential green energy source for Estonia. The EGT geological capacity enhancement will be implemented via range of joint activities such as scientific conferences and exchanges as well as through delivery of specialized training programmes provided by three leading geological surveys in Europe – the Geological Survey of Finland (GTK), the British Geological Survey (UKRI/BGS) and the Geological Survey of Denmark (GEUS). A further partner is the University of Oulu (UOULU), more specifically the Oulu Mining School (OMS), which provides a unique state-of-the-art platform for mining-related research and education.