The Basque Centre for Climate Change (BC3) opens a competitive call for applications to one PhD contract to develop the doctoral thesis in the area of integrated assessment modelling. The applicant will develop the thesis in the context of two European Commission HORIZON research projects (IAM COMPACT and DIAMOND), which aim to contribute to the development and application of integrated assessment models in the context of energy and environmental challenges. In particular, the candidate is expected to develop a deep understanding of an existing model that combinedly analyses economic, energy, land, water, and climate systems. The candidate will learn to use the model, improve some aspects, and develop new capabilities for the analysis of important and timely research questions. The research will be conducted at BC3 but also in collaboration with other international research institutions.