The upcoming edition of the symposium series on Energy Geotechnics, SEG23, will be held on 3-5 October 2023 in Delft. Keynote lectures from prominent researchers and practitioners in the field of energy geotechnics, state-of-the-art lectures and technical sessions focusing on the task forces of TC-308 will be a part of SEG23. We warmly welcome you to contribute and attend and look forward to an exciting scientific exchange. Contributions on various topics related to the energy geotechnics field, including geothermal energy, energy geostructures, energy storage, carbon sequestration, radioactive waste disposal and induced seismicity, are encouraged in the scope of SEG23. Researchers working on these challenging topics are invited to present their most recent advances. Practitioners are invited to share their experience on various topics of energy geotechnics were presentations of case studies are highly encouraged. Moreover, SEG23 will put emphasis on discussing innovative ideas and highly encourages the presentation of patents and start-ups in the broad spectrum of energy geotechnics.