Manfred Nußbaumer

Leonhardt, Andrä und Partner Holding AG engages in the planning of construction works. Its business activities include the planning, consulting, and monitoring of renovation, maintenance, and demolition works; assessment of calculations and plans; and preparation of expert assessments. The company was founded on November 23, 2012 and is headquartered in Stuttgart, Germany.

Ed. Züblin AG engages in the provision of building construction and civil engineering services. Its services include turnkey construction, structural maintenance, tunnelling, ground engineering, structural steelwork, timber construction, environmental technology, bridge construction, chimney and refractory engineering, construction logistics, and modular construction . The company was founded by Eduard Züblin in 1898 and is headquartered in Stuttgart, Germany.

Part of Bauer AG, Bauer Spezialtiefbau GmbH is a German company that specializes in deep foundation engineering, machinery, and resources. The company is based in Schrobenhausen, Germany. The CEOs of the company are Frank Haehnig, Arnulf Christa.