Within the 1st EOSC-Life Training Open Call, Open Life Science (OLS) was awarded the training grant to develop mentoring and training opportunities for EOSC Research Infrastructures Open Life Science (OLS) is a 16-week long personal mentorship and cohort-based training for individuals who would like to develop and lead Open Research projects in their communities. OLS will open a call for mentors and project leads from EOSC RIs for their third cohort, which is expected to take place from February to May 2021. In each cohort, the participants of this program will: share their expertise and gain knowledge essential to create, lead, and sustain an Open Science project connect with members across different projects, communities, backgrounds, and identities empower each other to become effective Open Science ambassadors in their communities This grant was co-authored by Bérénice Batut, Yo Yehudi, and Malvika Sharan. Our co-applicant, Michael Crusoe, supported the team in developing their budget and offered an expert review of the overall application.