Constantin Plenge

Thyssen Schachtbau GmbH provides construction, mining and exploration drilling services. It specializes in the construction of headings and the construction of large underground areas and mining services. The firm's services include engineering, steel construction, welding technology, assembly, building engineering, electrical engineering, mechanic and crane service. The company was founded in 1871 and is headquartered in Mulheim an der Ruhr, Germany.

FUNKE MEDIENGRUPPE GmbH & Co. KGaA engages in the publication of newspapers, women’s magazines, television guides, advertising papers, and books. It also operates radio stations. The company was founded by Jakob Funke and Erich Brost on April 3, 1948 and is headquartered in Essen, Germany.

OLKO-Maschinentechnik GmbH is a German company that specializes in shaft construction and conveyor technology. The private company is based in Olfen, Germany, and the CEO is Markus Beermann. The company offers future-based system solutions with a large production depth and in-house, often patented components. Founded in 1989, the company is a 100%% subsidiary of the Thyssen Schachtbau Group and provides innovative solutions to the mining industry worldwide.