|
 | | FingerHaus GmbH | München, Stuttgart, Frankfurt am Main, Hamburg, Berlin, Dortmund |
 | | Otto Building Technologies GmbH | Marburg, Bad Berleburg, Berlin, Dortmund, Hamburg, Hannover, Mannheim, Weiterstadt |
 | | Drees & Sommer SE | Hamburg, Hannover, Münster, Bremen, Dresden, Leipzig, Düsseldorf, Köln, München, Frankfurt, Berlin |
 | | Tiefbau Bauch GmbH | Berlin |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | Drees & Sommer SE | Berlin |
 | | Transumed GmbH | Berlin |
 | | Ed. Züblin AG | Berlin, Hamburg, Dresden, Rostock, Bremen |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | Drees & Sommer SE | Stuttgart, Berlin |
 | | STRABAG Rail Fahrleitungen GmbH | Berlin, Groß Kreutz, Freital |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |
 | | Ed. Züblin AG | Berlin, Hamburg, Dresden, Rostock, Bremen |
 | | B.B.S. Bauer's Buildings Services GmbH | Berlin |