Norbert Winkeljohann

Georgsmarienhütte Holding GmbH operates as a renewables and environment company. It focuses on the mobility, energy, and engineering industries. The company was founded by Jürgen Grossmann on October 1, 1997 and is headquartered in Georgsmarienhuette, Germany.

Sievert AG operates as a holding and administrative company for holdings in various branches of the construction industry. The firm provides construction materials including dry plaster, construction chemicals, and elements. Sievert operates worldwide. The company was founded in 1919 and is headquartered in Osnabruck, Germany.

Bohnenkamp AG supplies and distributes tyres products. It offers tubes, rims, wheels, tyres, and vehicles systems. The firm serves agricultural/forestry, industrial, and truck/trailer vehicles. The company is headquartered in Osnabrück, Germany.

Sievert Baustoffe GmbH & Co. KG is a German company that manufactures and distributes dry concrete, dry mortars, and mineral products. The company is based in Osnabrueck, Germany, and has subsidiaries in Germany. The company was founded in 2004, and the CEO is Norbert Winkeljohann.

heristo AG operates as a holding company, which engages in the manufacture and distribution of food products. Its specialties include raw sausages, fish and delicatessen, pet food, as well as meat, poultry, game, and agricultural products. The company is headquartered in Bad Rothenfelde, Germany.

Part of PricewaterhouseCoopers International Ltd., Pwc Europe SE Wirtschaftspruefungsgesellschaft provides accounting and taxation services. The private company is based in Frankfurt, Germany.

PricewaterhouseCoopers International Ltd. operates as an international association of accounting and consultancy firm. The company was founded on June 24, 1998 and is headquartered in London, the United Kingdom.