In the public sector, procurement managers are now required to comply with new sustainable regulations and to look for suppliers able to provide a sustainable offering. Stating that contracts can only frame part of the interaction and that parties often turn tomore negotiated agreements, we investigate whether sustainable expectations within public hospitals could impact supplier management and imply rearrangements between public buyers and private providers. Data were collected from fifteen French hospitals through semistructured interviews. Findings first highlight the sustainable expectations of public buyers from global key providers, and, second, that sustainable procurement does impact the relationship by creating new rules. Building on these results, managerial implications are suggested