Although the concept of buyer - supplier partnership and cooperation in the field of public procurement was launched in the early 90-ies, there is still the lack of flexibility in the classical system of public procurement, which is based on the bureaucratic principles and perception. The author's research is based on the theoretical sources and some examples of the cooperation between defense and private sector. This cooperation covers all military levels of operation (strategic, operational and tactical) and forms flexible integrated system of partnership that can be used as addition to the standard military logistics. At the strategic level cooperation between private and defence sector develops in areas of research and development (R&D), offset transactions, and planning of different non-R&D projects (infrastructure, military logistics, equipment, consulting etc.) which realization can be delegated to the lower level. In its turn, the cooperation at the operational and tactical levels is more or less connected with the deployment of military units and their participation in multinational operations worldwide. During his research author has found out that despite of great centralization of the defense procurement in previous years, modern procurement system can be described as a hybrid of centralization and the small degree of decentralization at operational and tactical levels.