Holger Sievers

Wintershall Dea International GmbH engages in the exploration, extraction, processing, storage, and marketing of oil, gas, and mineral deposits, including related main and by-products. Its business activities also include the construction and operation of gas piping systems. The company was founded on June 10, 1964 and is headquartered in Hamburg, Germany.

Voith GmbH & Co. KGaA operates as a holding company with interests in paper, fabrics, and hydro power generation. The firm’s principal activities are manufacturing of paper machinery, textile machinery, hydro fluid machinery, and turbo power transmission engineering. Its products and services include automation and digital solutions, drives & transmissions, connection components & couplings, hydropower components, hydraulics, pneumatics, cooling, braking systems and papermaking components. The company was founded in 1867 and is headquartered in Heidenheim, Germany.

Deutsche Steinkohle AG provides coal mining services. Its coke coal is used primarily for the production of steel and its hard coal is used for power generation. It operates mines in Northrhine-Westphalia, in the Saarland and a coking plant in Northrhine-Westphalia. The company is headquartered in Herne, Germany.

CETECOM GmbH engages in the provision of testing and certification of products with radio technologies. It offers EMC (electromagnetic compatibility) testing, radio testing, cellular testing, conformance testing, electrical safety testing, and audio testing services. The company was founded in 1993 and is headquartered in Essen, Germany.

Part of RWTÜV e V, Aktaios Verwaltungs-GmbH is a German company that provides investment services. The company is based in Essen, Germany. The company was founded in 2005. The CEO is Thomas Biedermann.

Part of RWTÜV e V, CUBIS Consulting Group GmbH is a holding German company that operates in the field of management consulting services. The company is based in Essen, Germany. The CEOs are Fabian Fechner, Reinhold Rüther, Thomas Biedermann. The company was founded in 2006.

Carl Zeiss SMT GmbH develops and manufactures lithography optics solutions and nanotechnology systems. It offers semiconductor equipment and lithography optics for wafer steppers and scanners. The company was founded in 2006 and is headquartered in Oberkochen, Germany.

DBT GmbH manufactures and supplies underground coal mining systems. It offers a range of equipment from hydraulic shield supports, electro hydraulic controls, conveyors, ploughs and shearers to crushers. The company was founded in 1995 and is headquartered in Lunen, Germany.

RWTÜV eV operates as an association, which focuses on the protection of natural and legal persons, property, and environment from detrimental impacts of technology. The company was founded in 1872 and is headquartered in Essen, Germany.

Raiffeisenbank Aichhalden-Hardt-Sulgen eG is a bank that offers a new VR Banking App for both private and business customers. The private company is based in Hardt, Germany. The app is designed to be simple, fast, and secure. The CEOs are Ralf Bantle, Markus Hezel. The German company was founded in 1922.

DMT GmbH & Co. KG provides mining equipment and consulting services. The company was founded in 1990 and is headquartered in Essen, Germany.

TÜV NORD Systems GmbH & Co. KG provides consulting, testing and inspection services for safety solutions. The company is headquartered in Hamburg, Germany.

Part of TÜV NORD AG, TÜV NORD Mobilität GmbH & Co. KG is a German company that provides testing and consulting services for vehicle and driving license tests. The company is based in Hannover, Germany. The company was founded in 2003. Hartmut Abeln has been the CEO of the company since 2017.

Part of Salzgitter AG, Salzgitter Flachstahl GmbH is a company that produces hot-rolled, cold-rolled, and coated flat steel products. The company is based in Salzgitter, Germany. The company also collaborates with Salzgitter Mannesmann Forschung to continuously develop materials and surfaces. In addition, the German company provides an online platform for its business partners to stay informed about the status of their orders. The platform includes information on the dimensions of hot-dip galvanized products and the surface type of Stronsal® coated products. The CEO of the company is Ulrich Grethe.

Part of RAG-Stiftung, Rag Anthrazit Ibbenbüren GmbH is a company based in Ibbenbüren, Germany. Rag Anthrazit Ibbenbüren GmbH specializes in solutions for water management, groundwater purification, and real estate. The German company's website also mentions their focus on sustainability and responsible business practices. The company was founded in 1989, and the CEO is Bernd Tönjes.

Part of TÜV Nord Cert GmbH, TÜV Nord International GmbH & Co. KG is a German company that provides management services. The company is based in Essen, Germany. The CEO of the company is Dirk Stenkamp.

Part of RWTÜV e V, RWTÜV Grundstücksverwaltungs-GmbH is a German company that provides real estate services. The company is based in Essen, Germany. The CEOs are Reinhold Rüther, Werner Schmitz. The company was founded in 2003.

Van Ameyde International BV offers internal claims process auditing for the insurance industry. Its services include claims handling, claims adjusting and surveying such as outsourcing claims processes, claims overflow services, fleet management, and risk management. The company was founded by H.A. van Ameyde in 1945 and is headquartered in Rijswijk, the Netherlands.

Part of RAG-Stiftung, RAG AG specializes in coal mining. The company is based in Essen, Germany. The CEO of the German company is Peter Schrimpf.

SYNLAB International GmbH offers medical laboratory services for practicing doctors, clinics and the pharmaceutical industry. It offers medical instruments, transfusion medicines, cytology, pathology, human genetics, and general hygiene services. The company was founded by Bartl Wimmer in 1998 and is headquartered in Munich, Germany.

GSB Gesellschaft zur Sicherung von Bergmannswohnungen mbH engages in the coordination of the interests of the tenants of miners' apartments and housing associations. The company was founded on December 29, 1981 and is headquartered in Essen, Germany.

Vereinte Dienstleistungsgewerkschaft is a trade union based in Germany. The German company provides information on current issues in society, business, politics, culture, and trade union issues through its publication, Ver.di Publik, which appears eight times a year. Ver.di is an expert in good work, fair wages, work-life balance, equal rights, and more. The company takes the time to answer questions and discuss topics in online meetings with its members. Ver.di positions itself with resolutions, declarations, and statements on legislative initiatives and much more. Ver.di TV provides surveys, backgrounds, portraits, reports, and more on the world of work and society.

RWTÜV GmbH is a technology service provider based in Essen, Germany, with subsidiaries in Germany. The German company's focus is on diversity, integrity, communication, customer orientation, sustainability, and entrepreneurship. The private company provides services in energy and environmental, telecommunications, insurance, and advanced consulting. The company has made strategic investments and is a secure partner for investments. The company also prioritizes company succession. The CEO of the company is Reinhold Rüther.

Part of RAG-Stiftung, Vivawest GmbH is a German company that focuses on the development and value enhancement of their properties. The company is based in Gelsenkirchen, Germany. The company manages over 120,000 apartments in NRW, providing homes for approximately 300,000 people. The company offers a repair service to quickly address emergencies and repairs for their tenants. The company was founded in 2006 and is led by CEOs Claudia Goldenbeld and Haluk Serhat. Vivawest was acquired by RAG AG on June 30, 2015.

Production in Time Zerspantechnik und Handels GmbH manufactures surgical instruments and implants. The private company is based in Schramberg-Sulgen, Germany. The German company was founded in 1990 by Jürgen Himmelsbach, Oswald Flaig.

Part of TÜV NORD AG, TÜV NORD Mobilität Verwaltungsgesellschaft mbH is a German company that provides industrial inspection services. The company is based in Hannover, Germany. The CEOs are Hartmut Abeln and Thorsten Walinger. The company was founded in 2003.

LAMARA Holding GmbH is a German company that provides investment services. The private company is based in Koethen, Germany. The CEO of the company is Lars Velde.

Part of Solarpark Blautal GmbH, centrotherm SiTec GmbH is a German company that manufactures inorganic raw materials and chemicals. The company is based in Blaubeuren, Germany and was founded in 2006.

Lausitz Energie Bergbau AG is a German company that specializes in mining, technology, and innovation. The company is based in Cottbus, Germany. The company offers energy solutions and services such as mechanical engineering, plant optimization, technical diagnostics, rail vehicle maintenance, and more. The company is ultimately controlled by the Government of Sweden. The CEO of the company is Thorsten Kramer.

Part of Fraunhofer-Gesellschaft eV, Fraunhofer-Institut für Keramische Technologien und Systeme (IKTS) is a research institute located in Dresden, Germany. The institute has three locations in Dresden, Hermsdorf, and Thuringia, making it the largest ceramic research institute in Europe. IKTS is currently working on various projects related to the production of green hydrogen. Additionally, the Sensor Space Summer School organized by IKTS teaches students from Hermsdorf about sensor technology and programming. Founded in 1992, IKTS conducts applied research for high-performance ceramics.