The COVID-19 pandemic has accelerated the implementation of virtual learning environments in university education. The EU-funded OPENING DOORS project aims to provide interdisciplinary, intersectoral and international training to post-graduate researchers delivered via a challenge-based open online educational programme on open science. The project, supported by connectivism as a pedagogical method, will identify the graduate skills in open innovation systems through interviews with PhD graduates, educators and employers. Moreover, it will co-design the programme with stakeholders from industry, government institutions and community structures, aiming to render post-graduates capable of managing connectivity through an open online learning system, thus increasing their intercultural sensitivity, digital skills and career prospects.