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.
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.-Ing. Wolfgang Cieslik
Born 1952 Dr.-Ing. Wolfgang Cieslik 2007 became a member of the Board of Evonik Steag GmbH, which was renamed STEAG GmbH in 2011, in 2007.
Cieslik was on the Board of the RAG subsidiary STEAG AG from 2004 and additionally took over chairmanship of Saar Energie AG and RAG Trading GmbH. He started his career with Ruhrkohle Aktiengesellschaft in 1984, where he held a number of positions over the next twenty years including Chairman of the Board of Ruhrkohle Verkauf GmbH. Prior to this, Dr. Ing. Wolfgang Cieslik completed his degree in fuel engineering at the Rheinisch-Westfälische Technische Hochschule Aachen (RWTH Aachen University), where he also attained his doctorate.
Born 1957 Alfred Geissler has been a member of the Board and Industrial Relations Director of Evonik STEAG GmbH, which changed its name to STEAG GmbH in 2011, since 2009.
Before this, Alfred Geissler was Industrial Relations Director and board member at Vattenfall Europe AG in Berlin from 2006. Between 1981 and 2005, he worked at the Industriegewerkschaft Bergbau und Energie (IG BE - German Mining and Energy Industrial Union, later: IG BCE - Mining, Chemical and Energy Industrial Union) where his posts included Head of the Department of Economics, Energy and Environmental Policy in Bochum and Member of the Central Board of Management in Hanover. Prior to studying economics at the university of Essen from 1976-1981, Geissler trained as a high voltage electrician and worked underground as a mine electrician (Auguste Victoria mine, Marl).
Dr. Heiko Sanders
Born 1969 Since May 2020 Heiko Sanders has been a member of the management of STEAG GmbH
He holds a doctorate in business administration and tax consultancy and has many years of experience in the energy industry. Until September 2015, Sanders was Chief Financial Officer of the energy service provider EWE AG in Oldenburg, Lower Saxony. In April 2016, he founded two companies: Dr. Sanders Organisationsberatung with a focus on strategy development, mergers & acquisitions and Dr. Sanders Investments. Heiko Sanders can look back on a total of 15 years as an executive in various entrepreneurial positions.
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 is Chairman of the Executive Board of Dortmunder Stadtwerke AG.
Dr. Bartels is Head of Sustainability / Energy Transition Management IG BCE
Rainer Enzweiler* Lawyer and Notary Public off duty, Duisburg
Josef Kremer Member of the Management Board Stadtwerke Dinslaken GmbH
Hartmut Gieske Member of the Board Energieversorgung Oberhausen AG
Jörg Jacoby** Chief financial officer Dortmunder Stadtwerke AG
Stefan Held** Public Accountant / Certified Tax Consultant
Prof. Dr. Susanne Knorre Executive Consultant
Gerhard Jochum Executive Consultant
Dietmar Spohn*/** Member of the Management Board Stadtwerke Bochum Holding GmbH
Dr. Arndt Neuhaus Executive Consultant
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** Chairman of the Essenworks 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