Joshua Ntajal is a senior researcher at the Center for Development Research (ZEF), University of Bonn, Germany. He holds a PhD in Geography from the University of Bonn, where he explored land use dynamics, surface water system interactions, and human health risk pathways. He has expertise in climate change and landscape modeling, hydrologic modeling, health geography, system dynamics, and flood disaster risk management. He joined ZEF (Health) in 2024 and is involved in the CRC TransRegio proposal (CLARISSA), climate change adaptation, and teaching. His research integrates GIS, remote sensing, system dynamics modeling, geostatistics, and collaborative intelligence to address climate change, land use, flood risk, water, and environment-related planetary health challenges in Sub-Saharan Africa. His work bridges science and policy to inform evidence-based decision-making.