Wien Energie
Wien Energie is the largest regional energy provider in Austria and a subsidiary of the municipal utility company Wiener Stadtwerke. We reliably supply two million people with environmentally friendly power, cooling, heating, electromobility and telecommunications. In order to promote climate protection, we will be investing heavily in expanding the use of renewables such as solar, wind and hydro power as well as electromobility. We are actively shaping the future of energy through innovation and research. We are ideally prepared for the future due to our efforts to promote climate protection and security of supply in the city.


Company
Wien Energies reliably supplies two million people and 230,000 commercial and industrial customers with energy. Security of supply and environmental protection are top priorities. Power and heat are produced from renewable energy sources such as solar, wind and hydro as well as biomass, waste incineration and cogeneration technology.
With annual revenues of EUR 3,347.1 million and 2,424 employees (2024), Wien Energie is one of Austria’s top 30 companies in terms of revenues. We are also one of the largest employers in the federal capital.
Our Management Team

Mag. Alma Kahler
General Manager
“The energy sector is undergoing major change. Looking in the rear view mirror is no help at all: Investments in security of supply, innovation and climate protection are the only keys to the future.”
Alma Kahler is responsible for sales and marketing, customer service, IT management, financial management and corporate risk.

Karl Gruber
General Manager
“We have understood the challenges presented by the new energy environment. We will be massively expanding renewable energy production in the years to come in order to promote climate protection.”
At Wien Energie GmbH, Karl Gruber is, among others, responsible for operating, servicing, developing and managing assets, in addition to organisational and personnel development as well as legal affairs.
Wien Energie Vertrieb
Wien Energie Vertrieb GmbH & Co KG is a subsidiary of Wien Energie. This company was founded in 2002 as a result of the deregulation of the energy market and is responsible for electricity and natural gas sales.
The core responsibilities of Wien Energie Vertrieb include the general management of energy sales, the development of new products and pricing.
EnergieAllianz Austria GmbH (EAA) is responsible for the general management of Wien Energie Vertrieb. EAA is the joint energy sales company of Energie Burgenland AG, EVN AG and Wien Energie GmbH. Wien Energie holds a stake of 45 percent in this company.


Energy & Climate Protection
The success of climate protection will be decided in cities since this is where nearly 80 percent of greenhouse gas emissions are released. Considerable change is necessary in order to drastically reduce CO2 emission levels. Wien Energie produces power, heat and cooling energy in an extremely efficient and environmentally friendly manner. We will continue to invest heavily in climate protection, security of supply and the expansion of renewables in the coming years.
Innovation & Research
Digitalisation is changing the energy sector at a rapid pace. As a modern company, Wien Energie adopts the latest technological trends and develops new business models and products. We work together with startups, research institutes and industrial partners to develop creative and future-oriented solutions as well as ready-for-market offerings – in the interests of our customers and more climate protection in the city.


Responsibility
As Austria’s largest regional energy provider, Wien Energie bears a particular responsibility. With over 2,000 employees, we are firmly committed to maintaining high social and ethical standards by our code of conduct. We protect the environment and take action so that Vienna remains the city offering the world’s best quality of life. This entails maintaining a balance between environmental, social and commercial interests.
Certificates & Awards
Quality, occupational health and safety as well as respect for the environment are key preconditions for our business activities. Certifications provide us with an incentive to continually improve our processes, our environmental efforts and to optimally minimise occupational and health risks at work.

We are certified under the following schemes:
Environmental Management
ISO 14001 & EMAS
Quality Management
ISO 9001
Occupational Health & Safety Management
ISO 45001