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Board of Management

The STEAG GmbH Board of Management is responsibly for the management of the STEAG Group. In addition, they regularly report to the Supervisory Board on any matters of relevance to the company.

Dr. Andreas Reichel

Chairman of the Board of Management

Born 1961
Andreas Reichel has been Labor Director and member of the Management Board of STEAG GmbH since August 2020 and its Chairman since January 2022, as well as Chairman of the Management Board of STEAG Power GmbH since December 1, 2022, and of Iqony GmbH since January 2023.

Previously, Andreas Reichel had been Executive Labor Director of E.ON Deutschland since 2018 and held this position in personal union with his work as a member of the Board of Management and Labor Director of E.ON edis AG, now E.DIS AG, which he had held since 2006. After studying law in Bonn, he obtained his doctorate from the University of Cologne in 1994 and became a member of the North Rhine-Westphalia state parliament in 1985. During his ten years as a member of parliament, Andreas Reichel was a member of various committees and became Secretary General of the North Rhine-Westphalia FDP in 1992. From 1995 to 2006, he was responsible for communications at the former Ruhrkohle AG and Ruhrgas AG.

Dieter Dehlke

Member of the Board of Management

Born 1965
Dieter Dehlke joined the management board of STEAG GmbH in January 2024.

After studying economics, he gained his first professional experience in investor relations at the Preussag Group in Hanover in the early 1990s, and ultimately took on the role of treasurer for the North American business. He gained further professional experience in positions at Siemens in Munich, Babcock Borsig in Oberhausen, Howaldtswerke-Deutsche Werft in Kiel, MAN Ferrostaal in Essen and the GEA Group in Bochum. Dieter Dehlke also worked at the Hamburg shipyard Blohm+Voss and the Dutch shipbuilder Damen before joining the HWP-Handwerkspartner Group in Hamburg as CFO in January 2022.

Nicole Hildebrand

Board Member

Born 1981
Nicole Hildebrand joined the management boards of STEAG GmbH, STEAG Power GmbH and Iqony GmbH in January 2024.

A political science graduate and fully qualified lawyer, she is a partner at STEAG’s owner Asterion Industrial Partners (AIP), where she is responsible for the energy business. She has worked for the Spanish infrastructure fund since it was founded in 2018. As an acknowledged energy expert, she has a total of 16 years of transaction experience in the European energy and utilities sector. Before joining AIP, Nicole Hildebrand worked for ten years in energy trading at Morgan Stanley in London and New York. She started her career at the law firm Freshfields Bruckhaus Deringer in London and Frankfurt. Nicole Hildebrand holds an MBA from the Saïd Business School at Oxford University.

Dr. Stephan Riezler

Board Member

Born 1963
Dr. Stephan Riezler has been a member of the Management Board of STEAG Power GmbH since 28 February 2024.


From December 2022 until his move to the Management Board, he was Commercial Manager Market / Trading at STEAG Power GmbH and at the same time Head of Front Office of the Trading division. Stephan Riezler can look back on a long career in the STEAG Group. From 2017 to 2022 he was Head of Front Office at Trading & Optimization, previously Head of Back Office in the same area from 2011 to 2016. From 2009 to 2011, he was Managing Director of Evonik Trading GmbH.

From 1997, when he joined STEAG, until 2009, he held various commercial positions, including that of Commercial Director at STEAG. Stephan Riezler studied economics at the Ruhr University and received his doctorate in 1995. He began his professional career at Thyssen Industrie AG in the controlling department.

Dr. Ralf Schiele

Board Member

Born 1966
Ralf Schiele has been a member of the Management Board of STEAG GmbH since October 2020 and a member of the Management Board of STEAG Power GmbH since December 1, 2022 and of Iqony GmbH since January 2023.

With a doctorate in mechanical engineering, he started his career in 1999 at STEAG encotec GmbH as a project manager. At the end of 2000, he moved to the then STEAG AG as project manager IPP project development and was initially responsible for the Southeast Asia region and then for Europe. From mid-2004 to the beginning of 2008, he took over the position of Head of Sales and Marketing at STEAG KETEK IT GmbH and in 2008 moved to Evonik Industries AG to join the Group Development and Portfolio Management department. In May 2011, Ralf Schiele joined STEAG Energy Services GmbH as a member of the management board, and from July 2011 to May 2021 he held the post of chairman of the management board.