Ukraine Calling is a project-oriented capacity building for organisations from Ukraine, Belarus, France, Poland, and Germany. It offers seminars and workshops to provide orientational and applied knowledge on the topic of local development, as well as to assist its participants in developing cross-sectoral competences and to foster international networking. Actors from various fields (i.e. human rights, culture, academia) are invited to apply, introducing a project idea for cross-sectoral transnational cooperation, that they want to develop for subsequent implementation after the programme. A special focus concerns the way complex societal challenges can be tackled better with the help of projects involving actors from different sectors, asking the following questions: What are success factors for cross-sectoral collaborations? How to bring differing expectations and logics together to serve a common goal?