The 2nd DiGiSect Expert Workshop on Design and Operation of Digitalized Sector-Coupled Energy Systems was held on April 20-21, 2023, in Vienna, Austria, organized by Austrian Institute of Technology (AIT). Experts from all over Europe gathered at Climate Lab Vienna to exchange their insights on operation, control, and digitalization in sector-coupled energy systems and sector integration, during the Expert Workshop on Design and Operation of Digitalized Sector-Coupled Energy Systems. Sector coupling and digitization must go hand in hand to support the energy transition as effectively as possible. Innovative digital technologies – e.g., AI, digital twins, and data spaces – will play an important role in this. The integration of these technologies at the system level, considering domain-specific constraints, will be a key factor. For this, we need more tools for the validation and implementation of projects. https://www.ait.ac.at/themen/power-system-digitalisation/digisect-2023