The CCRI CSA's goal is to strengthen and complement the CCRI, in order to foster the implementation of Circular Systemic Solutions (CSS) in European cities and regions. Based on an initial scoping and needs assessment, the CSA will set up an Expert Team to support Thematic Working Groups (TWGs) and provide complementary technical assistance to CCRI cities and regions during the duration of the project. The CSA will also deepen the CCRI knowledge on circular economy, with the production of highly impactful case studies on CSS, a series of white papers on key Research & Innovation (R&I) gaps, guidance documents for practitioners at the local and regional level, as well as recommendations for EU and national policy makers, to unlock barriers faced local and regional authorities. By establishing a series of mechanisms such as including webinars, study visits and a twinning program, the CSA will stimulate knowledge transfer, pear learning and capacity building towards an audience of cities and regions, including but not limited to CCRI Pilots and Fellows. All dissemination and communication activities will use the CCRI existing umbrella identity and existing communication channels. The CSA will endeavour to strengthen links with the European ecosystem and to promote the circular economy towards all European cities and regions. Those activities will be done in close coordination with the CCRI-CSO and DG RTD, to take advantage of potential synergies and importantly to prevent any overlaps and duplications with the work of the CSO. Led by ICLEI Europe, the CSA brings together 11 leading organisations active throughout Europe and with considerable expertise and experience in supporting cities and regions sustainability transition.