Recently, there is a new European Union commitment to the potential of the social economy which is a pioneer in job creation linked to the circular economy that will be further leveraged by the mutual benefits of supporting the green transition and strengthening social inclusion. Considering this general context, we propose in this paper an exploratory research aiming to investigate the potential of the Romanian social economy sector as part of a circular economy approach that could advance the green transition in the following years. Our paper is based on the findings of preliminary systematic content analysis for the identification of the social enterprises in Romania which include circular economy and/or green economy in their business model, and on qualitative research based on semi-structured in-depth interviews with the social economy organizations' managers. We have highlighted five good practice examples (Recicleta, Atelierul de Pânză, Educlick/Reconect, Remesh, and Bio&co Farm), which clearly show that combining the principles of social economy with the ones of circular/green economy is a strategy that might lead to overcoming the current challenges of the society. Our investigations represent the first approach to this topic, aiming to understand the specific challenges of the circular or green economy and social economy models when joining forces together for sustainable development in the context of an emerging social economy, as is the case of Romania.