Welcome to the International Workshop on Explainability Engineering (ExEn). This workshop is the successor of the International Workshop on Requirements Engineering for Explainable Systems (RE4ES), which was hosted at the IEEE International Requirements Engineering Conference 2021-2023. We aim to advance software engineering for explainable systems, foster interdisciplinary exchange, and build a community. This workshop edition consists of a mix of paper presentations from authors of different domains, one keynote as well as interactive activities to stimulate lively discussions.