The aim of this paper is to explore the key sustainability competencies increasing the employability of higher education graduates in Poland. Based on the results of a broad literature review on key sustainability competencies, the substantive contribution to a coherent framework of typologies of sustainability competencies will be synthesised. The developed research framework will subsequently be analysed with empirical data, collected by in-depth interviews (IDI) and focus group interviews (FGI) on the relevant employability competencies for the Polish labour market. This enables the elimination of critical gaps in the conceptualisation of the key sustainability competencies of higher education (HE) graduates related to the current and future labour market needs. The results of the analysis can make a contribution to sustainable HE graduate employability literature by exploring the links between employability and sustainability competencies. The results may be relevant to institutional support in the design and review of educational programs and training in order to foster sustainability competencies development.