This report describes the EASIER Autumn School, a workshop held on 25– 26 September 2023 in Hamburg. Titled “Sign language data meets data science – data science meets sign linguistics”, the workshop had the goal of generating expertise for under-resourced sign languages (SLs) to extend the scope of EASIER to more European SLs. The idea was to not only support people who already work with SLs and train them in technological approaches, but also to train people from data science, language technolo- gies, etc. in the handling of SLs. Two parallel tracks introduced both groups to relevant topics of the other area, followed by a joint track addressing lan- guage technologies of the EASIER pipeline and ethical considerations.