The executive board and the supervisory board



The executive board of AGO AG Energie + Anlagen

Günther Hein


(born in 1965) joined the executive board of AGO AG Energie + Anlagen in September 2011 and became spokesman of the board in 2013. Among other duties, he is responsible for the technology and distribution divisions. In September 2012, Günther Hein joined the regional board of directors of the Bavarian Association of Metal and Electrical Industries.


From 2009 to 2011, he worked as a managing director in the company KKT Kraus Klima u. Kältetechnik GmbH, located in Lauf on river Pegnitz, and reorganised the company during this period. Nine years earlier he joined Hyfra Industriekühlanlagen GmbH in Neuwied and worked there as a distribution manager and as a member of the excecutive board until 2009.


From 1991 to 2001 he was managing director of the company Atlatek Kältetechnik, located in Swakopmund in his native country Namibia.


Here you find images of our management team in printable resolution.

Georg-Stephan Wilkening


(born in 1975) joined the board of directors of AGO AG Energie + Anlagen in May 2013 and is responsible for the finance, controlling and human resources divisions. He worked as a management consultant for Pricewaterhouse Coopers and IBM Global Business Services from 2001 to 2008, where he was responsible for project and program management and the optimisation of processes and strategies. Between 2009 and 2013, he held various management positions in company re-organisation and re-structuring projects with the solar equipment manufacturer Roth & Rau and other companies.

The Supervisory Board of AGO AG Energie + Anlagen


The supervisory board of AGO AG Energie + Anlagen is composed of the following members:


Hans-Christian Semmler


(born in 1959) joined the supervisory board of AGO AG Energie + Anlagen in May 2014. He is the managing partner of the Frankfurt-based HCS Beteiligungsgesellschaft mbH, an associate company that he founded in 2003. This company has held the majority of the AGO AG shares since April 2013. From 2003 to 2010, he assumed the position of CEO with the public limited pharmaceutical company Haupt Pharma AG situated in Berlin. This contracting manufacturer of pharmaceutical products has an annual turnover of about 300 million Euro and runs various company sites in Europe and Japan. Until 2012, it was the most important company in the portfolio of the associate company HCS. Until 2001, Hans-Christian Semmler was chief financial officer in the MDAX-listed company Vossloh AG. He left Deutsche Bank in 1995 to join this technology provider for the railway industry. Hans-Christian Semmler is authorised to practise as a lawyer.



Florian Rentsch


(born in 1975) joined the Hessian Landtag in 2003 and became leader of the liberal party in the Hessian state parliament again in 2014. From 2012 to 2014, he was state secretary for economy, traffic and regional development in the federal state government of Prime Minister Volker Bouffier. Among other duties, he was responsible for the stock exchange supervision and assumed the following positions: chief officer in the WI bank committee (Hessian business development bank), deputy member of the board of administration of HELABA, chairman of the supervisory board of the Nassauische Heimstätte and the HESSEN-AGENTUR as well as deputy chairman of the supervisory board of the Frankfurt fair MESSE Frankfurt a.M. Since 2003, Florian Rentsch has been working as a lawyer parallel to his mandate in the federal state parliament of Hesse, first in a Wiesbaden-based lawyer's office and then in the Frankfurt-based Broich office.



Michael Deichsel


(born in 1955) was appointed as a professor for energy, heating, air-conditioning, refrigeration and plant technology at the Technical University of Nuremberg in 1995. In 2006, he assumed the position of the Dean of the Faculty of Mechanical and Building Services Engineering. Education: 1982 Graduate Mechanical Engineer at the Technical University of Munich, 1988 doctorate at the Institute of Thermodynamics of the Technical University of Munich. From 1983 to 1990, scientific assistant at the Technical University of Munich, 1990 employee of the company Popp in Bad Berneck in the construction and research division, 1991 to 1995 employee in an engineering office for energy, heating, air-conditioning and refrigeration. During his various professional activities, he has participated in R&D projects, concept studies and design projects in the field of automotive ventilation, building services and energy engineering. He is currently supervising research projects at the Institute of Energy and Building (IEG) and at the Nuremberg Campus of Technology (NCT) on the topics of the liquid piston Stirling process, energy efficiency investigations in laundries and the development of a recirculation process for the use of waste heat from a micro steam turbine. Chairman of the Franconian section of the German Association for Refrigeration and Air Conditioning (Deutscher Kälte- und Klimatechnischer Verein).