Sustainability and Procurement in International, European, and National Systems (SAPIENS) is an Innovative Training Network (ITN) financed by the EU's Horizon2020 Marie Curie Sklodowska Programme. It is the most extensive PhD programme on sustainability and procurement worldwide. It will add value to our understanding of using public procurement as an instrument to foster sustainability and advance the field of public procurement law, economics, and policy and its application in practice. SAPIENS assembles a distinguished group of leading academics who will supervise an outstanding cohort of 15 Early Stage Researches (ESRs) working on doctoral projects in Birmingham, Budapest, Cluj Napoca, Copenhagen, Gaevle, Greenwich, Hasselt, Lodz, and Rome. The employability of these 15 ESRs will be enhanced by a secondment programme which will expose them to work experience in international organisations, contracting authorities, lobbying bodies, and think tanks. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 956696