With the financial support of the EOSC secretariat, and in cooperation with the organisations EUDAT, EGI and OpenAIRE, a workshop will be organised to collaboratively work on the Rules of Participation for training in EOSC. Training is essential to make EOSC work. There is now a significant volume of training activities in EOSC with the associated deliverables and experiences. Obviously, training will be an important element of the future development and evolution of EOSC. With new EOSC (INFRAEOSC) calls on the horizon, and a new EOSC working group on Skills and Training to be established in 2020, it now seems the appropriate moment to bring trainers together and discuss how to improve EOSC training provision by its quality, findability, accessibility and the easier reuse of learning resources.