Hydrogen plays a key role in the decarbonization of our energy systems towards sustainable energy sources and sustainable energy storage. However, hydrogen also poses a variety of challenges for materials in contact with gaseous hydrogen under high pressure or for materials used for hydrogen storage. Hydrogen research is interdisciplinary between materials scientists, test engineers, chemists and physicists from universities, research institutions and industry. The 1^st Conference on Hydrogen in Materials Science and Engineering provides a platform for sharing and discussion of new research results from experiments and simulations. Core topics are material testing in the presence of hydrogen, spatially resolved imaging of hydrogen distribution in materials, direct reduction, selective hydrogen analysis, hydrogen permeation, hydrogen resistant materials and materials for hydrogen storage.