Ralf Jeffraim

Quarzwerke GmbH is a business engaged in the extraction, processing and refining of industrial minerals, particularly quartz, kaolin, feldspar, wollastonite and mica. Their raw materials are used in the paper, glass, foundry, ceramic and rubber industries, as well as in the production of paints, lacquers and coatings and in the area of construction chemicals. The company was founded in 1971 and is headquartered in Frechen, Germany.

Erich Friedrich Hüttenservice GmbH is a steel manufacturing private company based in Salzgitter, Germany. Erich Friedrich Hüttenservice GmbH specializes in the production of steel products. The German company was founded in 1990 and is currently led by CEOs Jörgen Johannes Sassen and Franz Rudolf Stallmann.

Part of Quarzwerke GmbH, Amberger Kaolinwerke Eduard Kick GmbH & Co. KG is a German company that provides a typo3 bootstrap4 theme. The company is based in Hirschau, Germany. The CEOs are Jens-Uwe Klemens, Otto Hieber, Robert Lindemann-Berk. The company was founded in 1996.

Quarzwerke International GmbH engages in the mining of chemical and fertilizer minerals. The company is based in Frechen, Germany. The CEOs are Otto Hieber, Robert Lindemann-Berk, and Wolf Harlfinger. The German company was founded in 2017.

Wasteland Investments BV is a privately owned investment company based in Amsterdam, Netherlands. The Dutch company focuses on investing in industrial SMEs, commercial real estate, and start-ups in the area of sustainability and healthcare. The company makes investments in the form of equity or senior debt in companies/projects with an enterprise value up to 30 million euros, facilitating buyouts or providing growth capital. Wasteland Investments is an active investor that supports its portfolio companies through its extensive business network, providing human resources and offering financial expertise. The company was founded by Jörgen Johannes Sassen, a Dutch national with a master's degree in corporate and commercial law from Leiden University and a master's degree in general management from Nijenrode University. Mr. Sassen has successfully founded and acquired several companies that provide services to the European steel industry, and in recent years, the scope of activities has been extended to include commercial real estate and start-ups with a sustainable and/or health focus.

Friedrich Services GmbH manufactures and markets road and civil engineering materials. The private company is based in Salzgitter, Germany. The German company was founded in 1994. Jörgen Johannes Sassen has been the CEO of the company since 2018.

Noris Entsorgung GmbH is a subsidiary of the GP Group, which is a network of 61 companies and operating units of GP Günter Papenburg AG. The private company is based in Hannover, Germany. The group employs around 4,000 people nationwide and operates in various sectors such as raw material extraction, construction material production, construction, logistics, recycling, and waste management. The CEO of the German company is Matthias Redeker.