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Managing Directors

Catherine Gras - Storengy Deutschland GmbH

Dr Frank Fischer, Dr Horst Hirschhausen - Storengy Deutschland Betrieb GmbH

Catherine Gras Horst Hirschhausen

Catherine Gras has been Managing Director of Storengy Deutschland GmbH and Chairman of the Supervisory Board of Storengy Deutschland Betrieb GmbH since 1 October 2018.

Catherine Gras began her career in the ENGIE Group with various roles in Finance, Mergers & Acquisitions, Exploration and Production. She then took over as Finance Director in the Gas Supply Division. This was followed by management positions in energy management and energy trading. Since 2016, she had been Managing Director of Storengy UK Ltd, for which she continues to act as Chairman.

Catherine Gras holds a Master's degree from the French ESSEC Business School. Before joining the ENGIE Group, she worked for a private equity fund and KPMG.

Dr Frank Fischer has joined the management of Storengy Deutschland Betrieb GmbH on 1 February 2021. He manages the business activities together with Dr Horst Hirschhausen, who has served as sole Managing Director since 2013.

As part of the joint management of the company, Dr Frank Fischer is responsible for maintenance, operation & maintenance services as well as QHSE/storage technology, while Dr Horst Hirschhausen manages the cavern storage, pore storage and technical dispatching services. During the course of the joint management, preparations are being made for Dr Frank Fischer to take over the sole management of the company. Dr Horst Hirschhausen is leaving the company and will enter his well-earned retirement.

Dr Frank Fischer, an energy and process technology engineer, has more than 15 years of experience in the ENGIE Group. Most recently he was Managing Director at ENGIE Generation Management GmbH, renamed Onyx Generation Management GmbH in 2020, and was responsible for the operational management of several power plants. He has extensive experience in various fields in the energy industry, including the project development of new plants, technical and commercial operations management, portfolio management, maintenance and deployment optimisation as well as occupational safety and environmental protection.

Dr Horst Hirschhausen has been Managing Director of Storengy Deutschland Betrieb GmbH since 1 March 2013.

Dr Horst Hirschhausen began his career at BEB (Esso/Shell) as a natural gas production engineer. Prior to this, he successfully completed a degree in deep drilling technology, oil and gas production with a doctorate in storage technology at Clausthal Technical University.

He then became the youngest member of the management team to take over the management of the Empelde natural gas storage facility of Gasspeicher Hannover GmbH. This was followed by management positions in Europe-wide pipeline and plant construction as well as in technical service, including Head of Services and Business Development in the ENGIE Group.

Rüdiger Grimm is Managing Director of the geothermal planning company geoENERGIE Konzept GmbH, a wholly owned subsidiary of Storengy in Germany.

Before that, after studying geology at the TU Bergakademie Freiberg, he worked as a project manager in the consulting industry. He first came into contact with geothermal energy at the end of the 1990s with the preparation of the study "Geothermal potential of Saxony's mine waters". Since then, in addition to the conception and preparation of geothermal potential maps, his references include more than 2,000 geothermal projects, ranging from single-family homes to the development of neighbourhoods in the megawatt range.

Rüdiger Grimm is a board member of the European Geothermal Energy Association (EGEC) and is actively involved in shaping the market environment in the German Geothermal Energy Association (BVG) and the German Heat Pump Association (BWP).

He has also been a guest lecturer at the TU Bergakademie Freiberg and the Bauhaus University Weimar for over 10 years.