On May 8, 2025, a webinar hosted jointly by the International Atomic Energy Agency (IAEA)?Department of Nuclear Energy, the?U.S. Department of Energy (DOE) Office of Nuclear Energy, and the?Energy Communities Alliance (ECA)?will provide information on Swiss Deep Geological Repository Siting Programme - Success Factors.This webinar will be delivered by senior staff of the Swiss Federal Office of Energy (BFE), the government agency responsible for the site selection procedure including regional participation; of Nagra, the organization responsible for the final disposal of radioactive waste and spent fuel in Switzerland; as well as by the Co-President of the regional conference N?rdlich L?gern. It is the fourth in a series of webinars informing on the Global Progress Towards Sustainable Endpoint Solutions for High-level Waste and Spent Nuclear Fuel.SpeakersPascale Kuenzi (Regional Participation Specialist, BFE, Switzerland)Tim Vietor (Head Repository Safety and Inventory, Nagra, Switzerland)Philipp Senn (Head of Communication and Public Affairs, Nagra, Switzerland)Christopher Müller (Co-President of the Regional Conference N?rdlich L?gern, Switzerland)Agenda“Fundamentals, Success Factors and Challenges” (Pascale Künzi, BFE)“Dos and Don'ts during field investigations for nuclear waste repositories in Switzerland.” (Tim Vietor, Nagra)“From Participation to Public Discourse: Communication Strategies and Examples along the Siting Process” (Philipp Senn, Nagra)"From Consultation to Collaboration: A Regional Perspective on Trust and Participation" (Christopher Müller, Regional Conference N?rdlich L?gern)ModeratorsMarla Morales -?Director, Office of Consent-Based Siting, US DOE/Office of Nuclear Energy, USASeth Kirshenberg – Executive Director,?ECA, USAStefan Mayer – Team Leader, Radioactive Waste Disposal, IAEA