In the field of hydrogen infrastructure, Fraunhofer conducts research on solutions for importing, transporting, and storing hydrogen and its derivatives − both in tanks and in geological formations. The scientific work focuses on supporting industrial implementation efforts, often requiring deep understanding of industrial processes and value chains. Thanks to the interdisciplinary structure of the Fraunhofer research network, a comprehensive and integrated portfolio of services is available, continuously developed through established industrial partnerships. Fraunhofer’s laboratory infrastructure supports industry partners in characterizing and advancing hydrogen-compatible materials and coatings for all components of hydrogen infrastructure. Test benches from component to pilot scale are used to develop and validate innovative import, storage, and tank systems, both above and below ground. Experimental investigations are complemented by detailed modeling. Advanced modeling of subsurface–technology interactions also enables reliable assessment of geological storage potentials and risk mitigation. Fraunhofer contributes its material science and application-specific expertise to standardization bodies, helping prepare for industrial-scale implementation through harmonization and standards development. Fraunhofer also supports the planning and design of hydrogen pipeline networks using physically accurate gas transport models, supplemented by topology-optimized network development models and techno-economic analyses.