Iqony makes green energy feasible.
With 85 years of experience in the planning, construction and operation of energy facilities, the company provides holistic solutions for the decarbonization, decentralization and digitalization of the energy supply.
Iqony focuses on renewable energies and bridging technologies that can be used in a climate-neutral way now and in the future. In addition to solar, wind and geothermal energy, the portfolio includes hydrogen solutions, storage technologies, engineering services and gas-fired power plants. Around 2,600 employees worldwide implement projects for major industrial companies, utilities, cities and municipalities in numerous countries across the globe. Specializing in tailor-made solutions for complex challenges, Iqony draws on its broad and in-depth knowledge of the energy industry across the full range of technologies and services.
Industry & Commerce
The energy transition presents challenges for industry and commerce. We provide you with the necessary security in a changing energy landscape, as we combine engineering expertise with many years of experience in the energy sector. Through process optimisation, renewable energies and predictive maintenance, we create long-term, cost-effective and sustainable solutions for industry and commerce.
Local Authorities & Municipal Utilities
Local authorities and municipal utilities are key players – facing a wide variety of challenges. They require solutions tailored to their specific needs. We are experienced partners to municipal utilities and local authorities in shaping the local energy and heating transition for a sustainable, cost-effective energy future.
Energy plant operators
Energy plants must operate reliably – sustainably, using renewable sources and with maximum availability. We ensure precisely that with the latest technology and comprehensive expertise. With our solutions for green electricity and green heat, you can also boost your public acceptance and competitiveness.
Project developers
Entrepreneurs face major investment decisions, as the energy transition requires new technologies and processes. We bring the knowledge and experience in project planning and financing to provide you with reliable support. With our technical and energy sector expertise, we ensure your investment is future-proof and profitable.
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 Directorof Uniper Energy Sales GmbH, leadingthe B2B businessforindustrial 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.
Our Strategy
As part of the Steag Iqony Group, we are actively shaping the future of energy. Our focus is on consistent decarbonization, the expansion of renewable energy, and innovative solutions such as hydrogen, battery storage, and climate-friendly heat supply. In this way, we are making an important contribution to a secure, sustainable, and modern energy supply.
