After the end of the Cold War, NATO recognized the importance of extending far beyond its traditional borders in order to maintain peace and stability throughout Europe. The incorporation of new members into the Alliance came to the fore. In the light of this approach, cooperation with partner nations became an important area for discussion. Ensuring that partner forces could work together effectively was one of the main objectives and this, in turn, highlighted the term ‘interoperability’ once again. Thus, the evolution of interoperability between NATO and partner nations after the demise of Cold War is considered in this essay, its importance is underscored, the levels of interoperability are introduced and the feasibility of Azerbaijan’s engagement in these levels is analyzed in this article. Different tools and mechanism that the Alliance has launched over the last decades are scrutinized and useful recommendations are considered for Azerbaijan to enhance its military interoperability with NATO. From this perspective of interoperability, different successful models have been outlined as examples for Azerbaijan to follow.