We bundle two important pillars of the energy transition
The Steag Iqony Group combines two important pillars of the energy transition under one roof: STEAG Power GmbH as a provider of security of supply and Iqony GmbH as a shaper of the energy transition. Together we are meeting the challenges of the energy transition. Here you will find an overview of our company, our strategic orientation and our corporate management.
We are shaping the future of energy
Our strategy
Our strategy is the basis of our actions. It provides orientation, creates clarity and guides us in everything we do. At a time of profound change in the energy industry, it provides direction and stability. It combines our ambitions with concrete measures and helps us to make conscious and targeted decisions - always with our common goal in mind: actively helping to shape a climate-neutral, secure and sustainable energy world.
Our mission
Using our high level of technical and energy industry expertise, we work as a team to create solutions for a sustainable and secure energy future.
In a constantly changing energy world, our plants and our team stand for reliability, adaptability, and proactivity.
As a profitably growing group, we work with our partners and customers to master the challenges of the energy transition.
Change needs vision.
Iqony has it.
The energy transition is taking shape and confronting our customers with many challenges. Iqony is at their side as a partner to provide the right solutions and products to master them - including the power from our own assets which enable a continuous, reliable supply of green energy.
Gundolf Schweppe
CEO
Since May 2026, Gundolf Schweppe has been appointed as CEO of STEAG GmbH and Iqony GmbH. He brings extensive international experience in the energy sector, with a strong focus on sales, trading, and transformation.
Prior to this, he served as CCO Sales at Uniper SE, where he was responsible for core european downstream sales and trading activities and played a key role in driving the strategic shift toward decarbonized, customer-focused business models. In parallel, he was Managing Director of Uniper Energy Sales GmbH, leading the B2B business for industrial and municipal customers.
Schweppe began his career within the E.ON Group, where he held various leadership positions in Germany and internationally.
Dieter Dehlke
CFO
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.
Antonio Haya
COO
Antonio Haya joined the management boards of STEAG GmbH and Iqony GmbH in February 2026. He has already been member of the management board from September 2025 to December 2025.
Antonio is an Operating Partner at Asterion Industrial Partners. He brings to the team over 35 years of experience in the Energy space in Europe.
Antonio is the founder and CEO of Haya Energy Solutions, a specialized consulting firm focused on the energy sector and based in Paris, which has developed M&A projects in renewable and conventional power generation, cogeneration, district heating, gas and power retail, energy procurement and power optimization in France, Spain, Portugal, Germany and Ireland.
Prior to this Antonio was CEO of KKR’s CELEST Power in France (2x410MW CCGT). Previously he was also CEO of Endesa France and General Secretary, Strategy & Corporate Development Director at E.ON France. Formerly, he held different positions at Endesa, including Responsible for M&A at Endesa Europe and Regulation Specialist at Endesa Distribution. Antonio holds an MBA from Deusto University and a Degree in Industrial Engineering by the Engineering School at Seville.
Verena Sievers
CHRO
Verena Sievers has been Labor Director and a member of the Executive Board of STEAG GmbH and Iqony GmbH since May 2026.
She has many years of experience in leadership and human resources roles within the Steag Iqony Group. She has been Labor Director and Managing Director of STEAG Power GmbH since May 2025 and continues to hold these positions. However, she stepped down from her role as head of the HR department, a position she had held since 2019, upon joining the executive board.
In addition, she served as chair of the employee representative committee and as a member of various supervisory boards representing employees. Other highlights of her professional career include senior positions in commodity risk management and trading at Steag, Evonik Trading, and RAG Trading. Verena Sievers studied economics at Ruhr University Bochum and graduated with a degree in economics in 2003.
Supervisory Board
The Supervisory Board of STEAG GmbH is made up of representatives of the shareholders as well as representatives of employees, senior managers and the Mining Chemical Energy Industrial Union (IG BCE). The Supervisory Board supervises and advises the Board of Management in performing its Group management tasks.
Shareholder Representatives
Nicole Hildebrand
Partner
Asterion Industrials Partners
Alexandre Karam
Principal
Asterion Industrial Partners
Fabian Ruetzel
Analyst
Asterion Industrial Partners
Jörg Weber 1/2/3
Chairman of the Board of Management
Petersberg Capital GmbH
Winnie Wutte 1
Founding partner
Asterion Industrial Partners
Since 1937.
