There is a shortage of software trainers at research organizations, which hinders the (re)use of open, FAIR and sustainable research software. Addressing this skill gap is important for the quality and impact of academic research in the Netherlands. We propose to bring together the software trainers from local Digital Competence Centers into the existing network Research Software Training NL (RSTNL). The Netherlands eScience Center will appoint a Network Coordinator who will organize train-the-trainer workshops, collaborative lesson development workshops, skill-up sessions and community networking activities. Together, this project will ensure capacity building and a solid foundation of a national training network.