This bachelor thesis is the result of a minor field study which took place in Bosnia and Herzegovina (BiH). The purpose of this bachelor thesis is to contribute to the understanding and improvement of Security Sector Reform (SSR), which could be explained as a process of reformation applied in post-conflict scenarios aimed at the military, police and/or judicial sector which might be an element of insecurity, particularly the police, and very particularly in post conflict scenarios where conflict resolution resulted in a divided police force, by using the BiH as a case study. We have used the theoretical framework/process of SSR and more specifically the part of SSR which touches upon police reform. However, SSR entails reformation of the security sector including military-, police- and judicial sectors, as mentioned our focus will be the police sector. This serving as a foundation for the thesis, we asked the following questions; Taking the point of departure in the Dayton Accords and its complex power sharing structure, which are the underlying factors/reasons why the Security Sector Reformation of the police force has been so problematic and why is there such inability to reach an agreement on this issue, especially in terms of structure? In terms of methodology, this is a qualitative study based on semi-structured interviews in combination with previous research. Concluding remarks, progress has been made, however, the reformation of the police is to a large extent dependent on the political will not to do so, not much indicate a change related to this. The status of the BiH police force continues to be de-centralized in terms of structure due to the Dayton Accords which has still serves a fertile ground for the continuation of inefficiency, especially in terms of cooperation, information exchange, administrative issues, war-criminals within the police etc related to the different police forces.