EARLI SIG 24, Researcher Education and Careers (SIG-REaC), was founded because increasing interest has emerged within the EARLI community into understanding different aspects of doctoral and post-PhD researcher educational and career development. This special issue brings together the outcome of our first scholarly discussion at the SIG-REaC inaugural meeting in September 2014 in Barcelona. The goal of each of the five co-authored papers is to make visible what has been overlooked, and to attend to methodological considerations in order to draw out future lines of research. As a collection, the papers address multiple levels and issues of researcher education: establishing the multifaceted phenomenon that is researcher education and careers and providing key concepts that others might take up, e.g., informal/invisible curriculum; the personal as a sphere of activity that may collide with the sphere of work; drivers of education that can provide cross-national points of comparison. Further, by identifying gaps in the literature, these papers together lay out an ambitious research agenda in a number of areas related to researcher education. In the process, they provide an extensive list of references well worth exploring since they represent the knowledge networks of over thirty researchers. In this editorial paper the Sig-REac is presented, and the characteristics of the papers, their limitations and some future challenges of researcher education are discussed. Keywords: Researcher education, career development; Post PhD education; PhD education; cross-cultural research