Olaf Czernomoriez

Dussmann Stiftung & Co. KGaA operates as a holding company with interests in service companies. It focuses on services in the areas of infrastructural and technical facility management, catering, as well as support and medical care for senior citizens. The company was founded by Peter Dussmann in 1963 and is headquartered in Berlin, Germany.

KEBT Kommunale Energie Beteiligungsgesellschaft Thüringen AG is a private company based in Erfurt, Germany. The German company provides investment services in the energy sector.

TEAG Thüringer Energie AG engages in the sale, distribution, and trade of energy and related products. It offers electricity, natural gas, as well as electro-mobility solutions. It also provides thermographic and air permeability examination of buildings, and other consulting services. The company was founded on November 15, 2007 and is headquartered in Erfurt, Germany.

KARL WEISS Technologies GmbH is a German company that specializes in civil engineering and classical piping and sewer construction. The private company is based in Berlin, Germany.

GASAG AG engages in the supply and distribution of electricity and natural gas. It also provides renewable energy solutions and services. The company was founded on January 1, 1847 and is headquartered in Berlin, Germany.