This study underscores the premise that national economic security is also described by the phenomenon of the public procurement contract, which will take into account the rigors imposed by the legislator, respecting the fundamental principles and capitalizing on concepts such as good management of public money, green procurement, wise procurement, control managerial quality, through the responsible involvement of all participating actors. The achievement of sustainable public procurement requires an extensive, complex process, which includes a set of effective tools and mechanisms. If we are to mention the public procurement contract and especially the procedures expressly provided by the Moldovan legislator, we can mention that this type of contract can be awarded through the following procedures: open tender; restricted tender; competitive dialogue; negotiated procedures; request for price offers; solution contest; acquisition in the case of social housing construction plans. The study includes a brief synthesis of the reasoned opinions of some authors, experts in the field of public procurement, regarding the development of the concept of ensuring economic security. The research methods used were varied: documentary analysis, comparative analysis, synthesis, the method of induction and deduction. The importance of knowing and capitalizing on tools and mechanisms for sustainable public procurement, in the context of ensuring national economic security, will take into account, first of all, the fundamental principle of the efficient use of public money, which will involve following a well-determined direction.