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About us

Renewable energy from Frankfurt am Main

Pioneer
since 1995

Planned by us. Run by us. For decades.

A family company in its second generation.

The GERES group of companies offers a comprehensive range of services in the planning, construction and technical management of facilities for generating renewable energy. As a family-owned company, the GERES-Group started out in Frankfurt am Main in 1995 and has been a pioneer in onshore wind project development in Germany ever since.

Sustainability as a company philosophy

From the outset, the GERES-Group has pursued a company philosophy that places the highest value on sustainable, high-quality project design. The focus is not only on safety and long-term predictability, but also on making projects compatible with the environment and society.

More than 200 megawatts planned and permitted

To date, the group of companies has planned wind energy projects with a total capacity of more than 200 megawatts in Germany and obtained the permits for them. It also operates its own wind turbines with a capacity of 166 megawatts. In the field of solar energy, the company has developed more than 50 megawatts internationally up to construction readiness.

Value creation stays in the region

Each year the GERES-Group feeds electricity from renewable sources into local grids and thereby makes a significant contribution to global climate protection. Realising its projects does not only advance the shift towards climate-neutral electricity generation. Local municipalities also benefit considerably from the financial returns. These are strengthened by participation models and by long-term lease and tax revenue, which supports the regional economy and makes municipalities more sustainable. With a further 150 megawatts in development, the company will continue to rely on a sustainable energy mix that both protects the environment and maximises economic benefit at local level.

Management

The management board of the GERES-Group

The GERES-Group is a family-owned company from Frankfurt am Main and is run today by the second generation. As a family-run group of companies, we have stood for efficiency, quality, trust and reliability for more than 30 years.

With lean structures and clear decision-making, we put our knowledge to work in high-quality projects. Our focus is not on growth at any price, but on sustainable solutions and long-term success.

This is how we build the basis of trust for stable partnerships with our employees, customers, landowners, municipalities and business partners.

  • Norbert Wiemann

    CEO

    Dipl.-Kfm. (business administration), founder

  • Carmen Wiemann

    CEO

    Business administrator

  • Etienne Wiemann

    CEO

    B. Sc., PG-Dip., M. Sc.

  • Fabrice Wiemann

    CEO

Partners

Strong partners at our side

In order to carry out our projects successfully and with a clear focus, we work with strong business partners at our side. We secure high availability, quality and performance through cooperation with capable companies in plant construction, engineering, planning, construction, law, consulting and financing.