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Stephan Kamphues is Chairman of the Executive Board of Vier Gas Transport GmbH, the 100% owner of Open Grid Europe GmbH, Germany's leading gas transmission grid operator. He held various positions in Ruhrgas as well as E.ON and became Member of the Executive Board of E.ON Ruhrgas International AG in 2004. His main focus was the acquisition and development of the company’s foreign shareholdings in Western and Central Europe. During this period he also served on several supervisory, administrative and executive boards. He took over as Open Grid Europe’s CEO in 2008 and was elected as first president of ENTSOG in 2009. In 2018 he also became president of the Society of Benefactors of the Institute of Energy Economics at the University of Cologne.