Security studies have only recently begun to analyze the complexities of managing the so-called new wars. This paper focuses upon the challenge of establishing inter-institutional interaction among different types of actors; civilian and military, state and non-state, involved in security governance aimed at managing new wars. The United Nations Security Council resolution 1325 is chosen as anempirical focal point for the analysis. The relationships among the actors engaged in implementing the resolution are often highly asymmetric in character. How do they view inter-institutional interaction? Are there differences in the prospects for interaction with regard to the two dimensions of the resolution; protection and participation of women and girls? Drawing on new institutionalist theory a framework for analyzing how different types of actors view interaction with each other are presented.