Since 2002, the European Union (EU) has increasingly gained influence over the transition process in Bosnia and Herzegovina. This process consists of two main, not fully complementary dimensions: state-building and EU member state-building. While the international community often used interventionist approaches to support the state-building process, the member state-building process is based on the principle of local ownership. By promoting both of these processes, the EU has been trying to introduce “good governance” practices in Bosnia. This paper analyses how effectively the EU has applied its foreign policy toolbox and transformative power to trigger good governance reforms in Bosnia in the security sector. By looking at the EU’s support for the fight against organized crime and police reform, the paper concludes that due to inconsistent approaches and policies, the EU has limited its ability to introduce “good governance” practices.