Green public procurement (GPP) has been identified as one of the main tools that public administrations can use to guide current consumption and production models in the direction of sustainability and to stimulate the dissemination of more innovative production processes and products that are able to earn new shares of the market. The political framework for GPP at the Community level is well-defined and expressed in various official communications, recommendations and reference standards.  Thinking back to the products, services and works to be procured, and shifting attention to the needs to be met and the services to be achieved, circular economic processes can also be activated and new relationships with businesses and territories can be triggered. All Member States have been called to define and adopt Action Plans for GPP: in Italy and Romania, the countries where project actions will mostly take place, the contexts are different. In Italy, the Action Plan was adopted in 2008 and updated in 2013, while in 2016 the obligation for the contracting authorities to adopt the minimum environmental criteria set by the PAN GPP (Law 221/2015) came into force. Meanwhile, several regional administrations have been activated to adopt in turn, GPP planning tools. In Romania, the Action Plan is still being defined. GPPbest activates a virtuous circle for the chain progression of GPP in the Italian regions involved (Basilicata, Sardinia, Lazio) and stimulates the launch of awareness and capacity building in Romania through the transfer of good practices and skills.