|
 | | Drees & Sommer SE | Berlin, Hamburg, München, Frankfurt am Main |
 | | BPG Bauüberwachungs- und Projektsteuerungsgesellschaft mbH | Lutherstadt Wittenberg, Berlin, Cottbus, Leipzig |
 | | RO 2 GmbH & Co. KG | Berlin |
 | | HKL Baumaschinen GmbH | Rüdersdorf, Berlin-Spandau, Königs Wusterhausen, Oranienburg, Potsdam, Brandenburg, Senftenberg |
 | | Polmetal GmbH | Berlin |
 | | Polmetal GmbH | Berlin |
 | | Ingérop Deutschland | Berlin |
 | | Eiffage Infra-Rail GmbH | Berlin, Leipzig |
 | | GOLDBECK Technical Solutions GmbH | Düsseldorf, Hamburg, Bielefeld, Berlin |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |