Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Weißböck Martin
- Ing. Weißenböck Simon
- Ing. Weißmann Christian GmbH
- Ing. Wellisch Erwin
- Ing. Welzenberger Elmar
- Ing. Wenger Manfred
- Ing. Weninger Konrad
- Ing. Wenzl Andreas Dieter
- Ing. Werber Herbert
- Ing. Werginz Heribert
- Ing. Wernbacher Bernd
- Ing. Werner Adelmann e.U.
- Ing. Werner Golser
- Ing. Werner Kercz Holding GmbH
- ING. WERNER MISTLBERGER e.U.
- Ing. Werner Pletzer Autohaus - Puls Air GmbH
- Ing. Werner POLZER GmbH.
- Ing. Werner Weissenböck GesmbH
- Ing. Wernisch Wolfgang
- Ing. Wetzelhütter Franz Konrad
- Ing. Wetzinger Johannes
- Ing. Wick Armin Valentin
- Ing. Widler Johannes
- Ing. Wiedenhofer Martin
- Ing. Wiederer Helmut
- Ing. Wiedermann Stefan Josef
- Ing. Wiedeschitz Roland Anton
- Ing. Wiedlroither Anna
- Ing. Wiehsböck Privatstiftung
- Ing. Wieland Richard
- Ing. Wieland Verena Marianne
- Ing. Wienerl e.U.
- Ing. Wiernsperger Karl Adam
- Ing. Wiesbauer Christoph
- Ing. Wiesenhofer Markus
- Ing. Wieser Friedrich
- Ing. Wieser Herbert
- Ing. Wieser Wolfgang
- Ing. Wiesinger Gerlinde Theresia
- Ing. Wiesinger Hannes Michael
- Ing. Wiesinger Martin
- Ing. Wiesinger Sebastian
- Ing. Wilfried Blank MA Angewandte Unternehmensberatung
- Ing. Wilfried Gruber Unternehmensberatung + Umweltanalytik
- Ing. Wilfried Vorderwinkler e.U.
- Ing. Wilhelm Fellinger e.U.
- Ing. Wilhelm Hutz GmbH
- Ing. Wilhelm Jungwirth GesmbH
- Ing. Wilhelm Mader Gesellschaft m.b.H.
- Ing. Wilhelm Weiss e.U.
- Ing. Wilhelm Wilfinger Gesellschaft m.b.H.
- Ing. Willibald Puntigam, Stadtbaumeister u. Architekt
- Ing. Wimmer Christian Leopold
- Ing. Wimmer Dominik Johannes
- Ing. Windisch Kurt
- Ing. Windischbauer Ewald
- Ing. Winkelbauer Christoph
- Ing. Winkelbauer Thomas
- Ing. Winkelhofer Otto
- Ing. Winkler Harald Karl Johannes
- Ing. Winkler Johann
- Ing. Winkler Johann Dieter
- Ing. Winkler Matthias
- Ing. Winkler Rainer Leopold Friedrich
- Ing. Winkler Stefan
- Ing. Winner Josef
- Ing. Winter Dominik
- Ing. Winter Georg Maria
- Ing. Winter Johannes
- Ing. Winter Norbert
- Ing. Winterleitner Christoph Thomas
- Ing. Wipplinger Patrick
- Ing. Witt Hans Jürgen
- Ing. Wittmann Michael
- Ing. Witzmann Alexander Maximilian
- Ing. Wofgang Huber - Ing.- u Sachverständigenbüro f Kfz-Schäden, Unfallanalyse u Unfallforschung
- Ing. Wohlfahrt Andreas
- Ing. Wohlfahrt Michael
- Ing. Wohlfahrter Christoph
- Ing. Wohlfart Stefan