The Doctoral School of the University of Warmia and Mazury in Olsztyn is seeking international experts to deliver four guest lectures in English for its PhD students (up to 100 participants). The lectures, each lasting 90 minutes, will cover interdisciplinary topics related to sustainable development, socio-economic challenges, and health and well-being. This initiative is part of the project "Internationalisation of Research and Transdisciplinary Education", supported by the Polish National Agency for Academic Exchange (NAWA) under the STER programme.