The purpose of this study is to understand how the informal localised practices of user groups (government ministries in Bahrain’s public sector) are (re)enacted in the appropriation of a standardized enterprise system along with its associated preconceived ‘best practices’. This research explores the practices revolving around a centralized pan-government Oracle HR enterprise system which has been deployed across Bahrain’s public sector as its being re-configured to provide e- government G2E (government-to-employee) e-services. By analysing the data from sociomateriality’s notion of performativity of practices, we will argue that the ‘best practices’ embodied within the centralized ERP did not gradually replace the local practices. But rather, the enterprise system is continuously being reconfigured and reinterpreted following its deployment to accommodate such locally situated practices. It is through the performative actions of the sociomaterial assemblages that involve the formal and the local practices that such a pan-governmental enterprise system can function within an IT-mediated public sector transformation in Bahrain.