This research examines the involvement of the parents of secondary school children in career education and guidance (CEG). It is based on a secondary analysis of existing data from a research project I was involved in. This initial research evaluated the impact of a parent-involved career intervention, ‘Parents Turn’, in which six career teachers delivered four successive sessions to parent(s) accompanied by their child in the third or fifth year of their secondary school (HAVO) in the Netherlands. The study is important both to the field and to practitioners. Examples of parent involved career intervention in CEG are limited, scantily researched, and most were not sustained, which may explain why knowledge on involving parents in CEG is underdeveloped. I discuss these gaps in the evidence by providing an overview on the literature on parental influences and roles in their child’s career development, an international inventory of and taxonomy for parent-involved, school-based career interventions, and providing relevant knowledge on parental-involvement in education in general. I then present new analysis of data collected by an earlier evaluation of the ‘Parents’ Turn’ intervention. My secondary analysis approaches this data with new research questions, in-depth analyses and a non-parametric methodology. I integrated the quantitative and qualitative results to understand who was involved in the intervention, why, and whether the impact differed for the learning of parents with and without higher education (HE) qualifications. I also sought to understand the role of the school in the intervention. The findings suggest that a school-initiated career intervention involving parents, in the form of family learning and community interaction, can build and enhance parents’ capacity to be involved in and support the career development of their child: their knowledge and skills, parental self-efficacy and parental role-definition. However, the career intervention works differently for parents who have different levels ...