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  • Board of Management

    Besides the Chairman, there are three other members on the STEAG GmbH Board of Management. They are jointly 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.



    Joachim Rumstadt

    Chairman of the Board of Management

    Born 1965
    Joachim Rumstadt has been Chairman of the Board of Management of STEAG GmbH, formerly Evonik STEAG GmbH, since January 2009. He also represents the company in national associations and international institutions.

    Prior to being appointed to the board in 2007, Rumstadt headed the Strategic Business Development department and was operationally responsible for the Power Division. In the course of his career, he also held posts as Head of the Executive Office and of the Risk Management Department. Before joining STEAG in 1997 as corporate counsel, Rumstadt was an advisor on international and European law at the research institute of the Deutsche Hochschule für Verwaltungswissenschaften (German University of Administrative Sciences) in Speyer. Prior to that, he completed his law degree at the University of Heidelberg and served for two years as a junior lawyer.

    Dr. Andreas Reichel

    Board Member

    Born 1961
    Since August 2020 Andreas Reichel has been a member of the Board of Management of STEAG GmbH.

    Previously, Dr. Reichel was acting Industrial Relations Director for E.ON Germany since 2018, a function which he exercised in addition to being a member of the Board and Industrial Relations Director of E.ON edis AG, today E.DIS Fürstenwalde, positions which he had held since 2006. After studying law in Bonn he received a doctor’s degree in 1994 from the University of Cologne. In 1985 he became a member of the State Parliament of North Rhine-Westphalia. In his ten years as MP Dr. Reichel was member of various committees and became Secretary General of the North Rhine-Westphalian FDP in 1992. In the years 1995 to 2006 he was responsible for communications at the then Ruhrkohle AG and at Ruhrgas AG.

    Dr. Ralf Schiele

    Board Member

    Born 1966
    Ralf Schiele has been a member of the Board of Management of STEAG GmbH since October 2020.

    Having obtained a doctorate in mechanical engineering, he joined STEAG encotec GmbH in 1999 as a project manager. At the end of 2000 he moved to the former 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 held the function of Head of Sales and Marketing at STEAG KETEK IT GmbH and in 2008 moved to the Corporate Development and Portfolio Management department of Evonik Industries AG. Sn May 2011, Dr. Schiele joined STEAG Energy Services GmbH (SES) as a member of the Management Board, and from July 2011 to May 2021 he held the post of Chairman of the Management Board.

    Ralf Schmitz

    Board Member

    Born 1967
    Ralf Schmitz has been a member of the Board of Management of STEAG GmbH since July 2021.

    The graduate industrial engineer and partner in the management consultancy Schmitz & Partner, has been working successfully as CEO or CRO in the restructuring of industrial companies for more than two decades. He also has proven experience in the development and expansion of new business areas and in negotiations with financiers.

    Supervisory Board

    The Supervisory Board of STEAG GmbH has 20 members. It brings together representatives of the shareholders, of the employees, of executive personnel and of the Mining, Chemical and Energy Industrial Union (IG BCE). The Supervisory Board supervises and advises the Board of Management in performing its Group management tasks.

    Guntram Pehlke*


    Guntram Pehlke is Chairman of the Executive Board of Dortmunder Stadtwerke AG.

    Dr. Bartels*/**

    Deputy Chairman

    Dr. Bartels is Head of Sustainability / Energy Transition Management IG BCE

    Shareholder Representatives

    Rainer Enzweiler*
    Lawyer and Notary Public off duty, Duisburg

    Hartmut Gieske
    Member of the Board
    Energieversorgung Oberhausen AG

    Jörg Jacoby**
    Chief financial officer
    Dortmunder Stadtwerke AG

    Gerhard Jochum
    Executive Consultant

    Prof. Dr. Susanne Knorre
    Executive Consultant

    Josef Kremer
    Member of the Management Broad
    Stadtwerke Dinslaken GmbH

    Dr. Arndt Neuhaus
    Executive Consultant

    Karl-Wilhelm Schröder
    Auditor / Lawyer / Tax consultant

    Dietmar Spohn*/**
    Member of the Management Board
    Stadtwerke Bochum Holding GmbH

    Employee Representatives

    Andreas Detemple
    Chairman of the Works Council for the Fenne Power Plant

    Markus Drese
    Chairman of the Works Council for the Walsum Power Plant

    Thomas Dinter
    Chairman of the Works Council Herne
    combined heat and power plant

    Bernd Hagemeier */**
    Chairman of the Group Works Council
    STEAG GmbH

    Ursula Samland**
    former Chairman of the Essen works council STEAG GmbH

    Thomas Zimmer
    Chairman of the Works Council for the Bexbach Power Plant

    Representative of executive

    Jörg Banaszak
    Head of purchasing department
    STEAG GmbH

    Representative of the Mining, Chemicals and Energy Industrial Labor Union (IG BCE)

    Karlheinz Auerhahn
    Recklinghausen Area Manager IG BCE

    Michael Vassiliadis*
    Chairman of the IG BCE union

    *)  also a member of the Executive Committee of the Supervisory Board
    **) also a member of the Auditing Committee of the Supervisory Board