Enterprise Resource Management (ERP) software is used by organizations to control accounting, manufacturing and customer processes. It is common practice that organizations use more than a singular ERP system and various modules from multiple ERP vendors in their business. Hence, there is a need to integrate systems and find technical solutions that allow the EPRs to communicate. This thesis presents the development of a Generic Integration Layer (GIL) that allows various available ERP systems to exchange data. The goal was to design and develop a module that could integrate different ERP modules, fill the data communication gaps among them, with the goal to minimize the need to use several commercial product for data integration purposes. The developed GIL allows flexible import from different file formats as well as provides verification and updates in a database management server. Moreover, it transforms data into a generic format based on XML that can be read by many modern ERPs. / Master Thesis / Development of a Generic Integration Layer for an ERP system