Mathias Uslar has studied computer science with a minor in legal informatics at the University Of Oldenburg, Germany form 1999 till 2004. In October 2004, he started working a scientific assistant at OFFIS - Institute for Information Systems in Oldenburg, later on working there as project leader and now as Group manager in the Energy branch of the institute, leading the largest group in OFFIS. Since 2008, he is head of the CISE, the Centre for IT Standards in the Energy Sector. In October 2009, he successfully defended his phd thesis on the Integration of heterogeneous standards in the electric utility domain and smart grids. Mr Uslar is leading OFFIS' national and international work packages with the scope of standardisation and interoperability. He is member of German GI, IEEE, ACM and IEC german mirror committee member DKE K 952, 952.0.10, 952.0.17 and international member of IE TC 57 WG 14 and 16. His research interests are with Semantic modeling and technical interoperability in smart grid architectures. Currently, he is working on modeling DER like CHP oder PHEV using the CIM (IEC 61968) and creating control structures for virtual power plants.   Sebastian Rohjans has joined the OFFIS -Institute for Information Systems in late 2008. He holds a computer science degree from the University of Oldenburg with a minor in business and wrote his thesis about ontology based integration. He is now working in industrial setting projects having the same scope. His research interests include semantic web services, the OPC unified architecture and ontology based mediation.   Michael Specht works since August 2008 as a scientific assistant at the OFFIS institute. He wrote his diploma thesis about ”Ontology based integration of quality codes in the electricity domain”. His main working topics are CIM based XML messaging and CIM topology modeling.   Jose Manuel Gonzalez Vazquez works since January 2008 as a scientific assistant and PhD candidate at the OFFIS institute, Oldenburg. His research is on reference models and IT systems in the utility domain (electricity and gas). Further on he is actively involved in national and international standardization and is member of the IEC TC 57 Working Group 14, where he is part of the Common Information Model (CIM) modeling team.   Robert Bleiker works since July 2009 as a scientific assistant at the OFFIS institute. He wrote his diploma thesis about ”The word problem for petri nets”. His main working topics are automated testing of standard conformance and compliance for IEC 61850 and CIM.