Forward with sustainable energy

Ventolines has a clear mission; we want a world in which sustainable energy is of value to everyone. To help achieve that, we develop, build and manage sustainable energy projects with the utmost attention and precision, keeping a keen eye on the interests of stakeholders at the same time. We are a decisive company and we go about our business with skills and inventiveness. We are aware of our responsibilities at every stage of a project, and we know we can cope with the challenges until we have reached the finish line. Realising a successful end result together; that is always our aim. Only then will sustainable energy ensure progress for everyone.


Ventolines has a clear mission; we want a world in which sustainable energy is of value to everyone.


We are convinced that the sustainable energy transition offers opportunities for all: cooperatives, neighbourhood communities, investors, farmers, energy providers, governments and consumers. In our world, sustainable energy means progress for everyone.

Core values

We are purposeful and never give up. We are full of energy and persuasion to realise projects in the best possible way.

We have all the knowledge and experience in-house and take responsibility at every stage. In this way we guarantee a reliable and high-quality end result.

We are smart and resourceful. We dare to think differently when necessary. We always want to come up with an appropriate solution that works for everyone.

Our team

With a team of 100, Ventolines is an active player in the world of sustainable energy. We are decisive, skilled and inventive, supported by a wide and in-depth knowledge of the energy industry and sustainable energy in particular. Within Ventolines, we work closely with engineers, lawyers, communication advisors, business management experts and financial specialists. That is how we ensure progress for our customers across the full extent of their projects.

Our history

For many years Ventolines has been involved in the development, construction and management of a large number of sustainable energy projects, both on land and in the water. Think for example of the largest onshore wind farm of the Netherlands: Windplan Groen and the world’s largest offshore wind farm in a lake: Windpark Fryslân. The team now comprises more than 100 employees, but it all started with the enthusiastic brother and sister Anne and Jelma de Groot.

Anne and Jelma de Groot grew up in the Noordoostpolder. They were raised on the importance of sustainable energy when, in 1995, their father was one of the first to install a wind turbine on his arable farm. Anne got the better of it and, together with his father and a number of partners, set up a wind farm in Delfzijl. After studying Agricultural Engineering in Wageningen, he decided to return to the Noordoostpolder with his wind ideas and plans. After secondary school, Jelma went to Henley Business School and began an international career as a marketing professional. After a few years abroad, the family business called and she returned to the Dutch mainland, ready to make sustainable energy her profession. Together with her brother, she joined forces and in 2007 Ventolines was born.

After the successful realisation of wind farm Westermeerwind, with wind farm Fryslân (~350MW) in an advanced stage of development and contracting, Jelma and Anne decided it was time to apply their knowledge and experience in wind energy projects to the solar energy sector. Therefore, they established a solar energy department within Ventolines: to date a great success and still growing. And it did not stop there. Ventolines has also developed strongly in other forms of sustainable energy. In addition to wind and solar energy projects, Ventolines has a lot of knowledge and experience in the field of storage and cable pooling.

The Ventolines team now consists of more than 100 (international) employees, each with their own expertise and unique personal contribution. Together they help clients progress across the entire spectrum of a project. They are full of decisiveness, inventiveness and skills to bring every energy project at Ventolines to a successful result.

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