Steag Power
We ensure a secure energy supply. Now and in the future.
Steag Power consolidates the power station business and operates seven hard-coal-fired power stations at six sites in Germany, providing both market-based and reserve power with a total electrical output of around 3,500 MW. In this way, it makes a significant contribution to security of supply in Germany and the European UCTE grid (Union for the Co-ordination of Transmission of Electricity). Our share of total electricity generation in Germany is around five per cent.
Steag Power Markets
Steag Power consolidates the power station business and operates seven hard-coal-fired power stations at six sites in Germany, providing both market-based and reserve power with a total electrical output of around 3,500 MW. In this way, it makes a significant contribution to security of supply in Germany and the European UCTE grid (Union for the Co-ordination of Transmission of Electricity). Our share of total electricity generation in Germany is around five per cent.
Our value creation ranges from global fuel procurement and the necessary logistics to the power stations in the Ruhr and Saarland regions. We remain committed to our strategy of phasing out hard coal-fired power generation in the long term.
Duisburg-Walsum
| Commissioned in | 2013 |
| Net capacity | 725 MW |
| Location | Duisburg-Walsum, NRW, Deutschland |
| Operation | Market-based operation |
Bergkamen
| Commissioned in | 1981 |
| Net capacity | 717 MW |
| Location | Bergkamen, NRW, Deutschland |
| Operation | Grid reserve |
Bexbach
| Commissioned in | 1983 |
| Net capacity | 726 MW |
| Location | Bexbach, Saarland, Deutschland |
| Operation | Grid reserve |
Weiher
| Commissioned in | 1976 (Block Weiher III) |
| Net capacity | 656 MW |
| Location | Quierschied, Saarland, Deutschland |
| Operation | Grid reserve |
Heizkraftwerk Herne
| Commissioned in | 1989 |
| Net capacity | 460 MW |
| Location | Herne, NRW, Deutschland |
| Operation | Grid reserve |
| District heating capacity | 550 MJ/s |
Völklingen
Modellkraftwerk Völklingen
| Commissioned in | 1982 |
| Net capacity | 179 MW |
| Location | Völklingen-Fenne, Saarland, Deutschland |
| Operation | Grid reserve |
Völklingen
Heizkraftwerk Völklingen
| Commissioned in | 1989 |
| Net capacity | 211 MW |
| Location | Völklingen-Fenne, Saarland, Deutschland |
| Operation | Grid reserve |
Thomas Ciecierski
Member of the Management Board
From January 2024 until his appointment to the Executive Board, he was Head of the Technology Division at STEAG Power GmbH. In December 2024, he also took on the role of Technical Advisor to STEAG Power GmbH and Iqony GmbH.
From January 2011 to December 2013, he was Head of the Procurement/Sales – Electricity and CO2 Department in the Front Office Division B&O at STEAG GmbH, Essen (since 1 December 2022 STEAG Power GmbH). Prior to this, he held various positions in the load dispatch division, most recently as Head of the Load Dispatch and Short-Term Electricity Trading Unit within the EW / Load Dispatch division at Evonik STEAG GmbH until 2010. Thomas Ciecierski began his career in 1989 with an apprenticeship as an energy electronics technician at the STEAG power station in Lünen. Alongside his subsequent work as an energy electronics technician at the Lünen power station, he completed a degree in electrical power engineering at Dortmund University of Applied Sciences.
Karl Resch
Member of the Executive Board
Karl Resch has been with the STEAG Group since 2013 and has held various positions in energy trading and business development during this time.
Most recently, he served as Head of Portfolio Management & Origination at STEAG Power GmbH from 2024; prior to that, he headed the Sales & Origination division at STEAG GmbH from 2017, and at STEAG Power GmbH from 2023. Karl Resch has been an authorised signatory of STEAG GmbH since 2013 and has also been an authorised signatory of STEAG Power GmbH since 2023.
Prior to joining STEAG, he had already spent around fifteen years in various roles within the energy sector, most recently as an authorised signatory and Head of Industrial Sales & Customer Relationship Management at RWE Supply & Trading in Essen, and previously at Enron Energie in Frankfurt am Main and at OMV in Vienna. His background in the energy sector, as a graduate engineer in Applied Geosciences with studies at the Montanuniversität Leoben (Austria) and the Colorado School of Mines (USA), was complemented by an Executive MBA in General Management from the University of St. Gallen (Switzerland).
Verena Sievers
Member of the Management Board
She also continues to head the HR department for the entire group, a role she has held since 2019. She continues to fulfil this role alongside her management duties at STEAG Power GmbH.
Until April 2025, Verena Sievers was also Chair of the Senior Executives’ Committee and, in this role, also assumed the mandate for senior executives on the employee side of the Supervisory Board of KSBG GmbH and STEAG GmbH. Verena Sievers looks back on a long career within the STEAG Group. From 2017 to 2019, she was Head of Back Office at Trading & Optimisation; prior to that, she was responsible for risk management in the Group’s commodity trading under various corporate structures and, in this capacity, helped to establish the trading division as it stands today.
Verena Sievers studied economics at Ruhr University. She began her professional career within the Group in 2004 at RAG Coal International AG in the International Management & Development division, before moving to the coal trading division of RAG Trading GmbH.
Gundolf Schweppe: “We will continue to build on our pioneering role”
Gundolf Schweppe brings around 20 years of experience in the energy sector and joins from Uniper, where he was most recently responsible for the downstream business with industrial customers and municipal utilities.
On taking up his post, Schweppe emphasised: “The Steag Iqony Group is excellently positioned to bring together security of supply, climate protection and affordability. It embodies the energy sector’s triple bottom line. Together with thousands of colleagues, we are building hydrogen-compatible power stations and battery storage facilities, driving forward climate-friendly heating, investing in renewable energies and supporting industry and local authorities with decarbonisation solutions. On this course, we will continue to expand our pioneering role.”
Verena Sievers: “The energy transition can only succeed with the people who shape it”
Verena Sievers has headed the Group’s HR division since 2019. Prior to this, she was, among other roles, Head of Commodity Risk Management and Energy Trading at STEAG and has been a key figure in the energy sector for more than 20 years.
Sievers also sees the growth and transformation strategy as a human resources challenge: “The energy transition can only succeed with the people who shape it. We are driving forward skills development, modern working environments and the further development of our long-standing culture in a targeted manner. This is how we are making our company fit for the future.”
Jesús Olmos: Steag Iqony Group stands for “a seamless energy transition”
Jesús Olmos, CEO and founder of Asterion Industrial Partners, the owner of the Steag Iqony Group, adds: “The Steag Iqony Group is entering the next phase of its success story. The new leadership duo brings innovative ideas to the table and is driving the company forward alongside experienced CFO Dieter Dehlke and Antonio Haya on the Management Board. The Steag Iqony Group is ideally positioned for this: it stands for a seamless energy transition, for security of supply and climate neutrality. That is exactly what is needed.”
