With more than 9,000 employees and sales of 7.57 billion euros (2016), EWE is one of the largest municipal energy service providers in Germany. The group of companies has its own generation capacities from renewable and conventional energies and operates modern, secure energy and telecommunications networks. How much money the network operators are allowed to earn for the transmission of electricity, gas or telephone calls through their networks depends, among other things, on how efficiently they work. CIM Database has been supporting infrastructure management at EWE Netz GmbH in Oldenburg since 1999. The system contributes to a high level of supply security and cost-effectiveness through digital management and the provision of plant documentation as well as support for efficient operation and expansion of the networks.