Ralf Siefen


Ralf Siefen, Chief Executive Officer, founded the Data Center Group in 2005 under the name proRZ Rechenzentrumsbau GmbH and built it up into one of the market-leading companies for the consulting, planning, construction, service and operation of data centers. Today, the company employs around 200 people and can look back on more than 2,500 national and international projects. He gained his expertise in the planning and realization of data centers in during his professional career with the company Lampertz. There he was responsible for national and international project management for more than 12 years as a member of the management board.

As before, his great passion is the design of secure, efficient, highly available and sustainable data centers that are future-oriented and adapt to the needs of small and medium-sized enterprises up to corporations and hyperscalers.

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Data Center Group CEO Ralf Siefen
Data Center Group CFO Dr. Ferdinand Höfer

Dr. Ferdinand Höfer


Dr. Ferdinand Höfer is Chief Finance Officer of the Data Center Group and thus responsible for the commercial area of the company.
Dr. Höfer studied business administration at the universities of Regensburg and Dublin. He received his doctorate from the Institute of Business Administration at the University of Augsburg (Chair of Auditing and Controlling).
His previous positions were with PriceWaterhouseCoopers in auditing as well as in various leading controlling fiunctions in the EnBW Group. In addition to his position as CFO at Data Center Group, he is also Managing Director of the Mannheim-based partner company MVV Enamic GmbH and is thus actively involved in shaping customer solutions for sustainable energy supply and decarbonization.

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