Teachers’ capabilities to act as active change makers in the ecological transition and to educate citizens and workforce to meet the future challenges is key to a profound transformation in green transition. Teachers’ sustainability competences have been researched widely but a gap remains between research and the actual work of teachers. There is a need to operationalise sustainability competences: to describe the direct links with the everyday tasks such as curriculum development, pedagogical design and assessment. Due to the urgent need for sustainably competent workforce, the project focuses on re- and upskilling VET teachers. EduSTA builds a community “Academy of Educators for Sustainable Future” and creates open digital badge-driven learning pathways on teachers’ sustainability competences supported with multimodal learning modules. Close cooperation with training schools actively engage in-service teachers.EduSTA starts by mapping the contextual possibilities and restrictions for transformative learning on sustainability, and by operationalising skills. The development of competence-based learning modules and open digital badge-driven pathways proceed hand in hand and is realised as learning modules in the partnering HEIs and badge applications open for all teachers in Europe. EduSTA will be impactful for pre- and in-service teachers, and at institutional and policymaking levels. A diverse palette of educational concepts on teachers’ sustainability competences and open digital badge-driven pathways will support the European dimension and facilitate recognition of prior learning as micro-credentials. EduSTA will equip policy makers with up-to-date knowledge and evidence on the transformative power the operationalised competences can offer to the society, and of the use of open digital badges in the context of sustainability competences. EduSTA will add to the attractiveness of teacher profession by establishing teachers as key actors in green transition.