Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Woitischek Kurt
- Ing. Woitischek Thomas
- Ing. Wolff Lothar Ernest
- Ing. Wolfgang Boch Gesellschaft m.b.H.
- Ing. Wolfgang Bornatowicz
- Ing. Wolfgang Brunnsteiner
- Ing. Wolfgang Fritz Ingenieurbüro - beratender Ingenieur e.U.
- Ing. Wolfgang Früchtl BSc e.U.
- Ing. Wolfgang Früchtl BSc eU
- Ing. Wolfgang Früchtl BSc eU
- Ing. Wolfgang Gebetsroither und Mag. Georg Hochleitner Gesellschaft bürgerlichen Rechts
- Ing. Wolfgang Gruber Baumanagement GmbH
- Ing. Wolfgang Hackl CAD/CAM-Consult GmbH
- Ing. Wolfgang Heinrich Elektrotechnik & Heizungstechnik e.U.
- Ing. Wolfgang Kaim e.U.
- Ing. Wolfgang Kaltenbrunner e.U.
- Ing. Wolfgang Kogelmann e.U.
- Ing. Wolfgang Minichberger - Dipl. Body Vitaltrainer
- Ing. Wolfgang Preier
- Ing. Wolfgang Sattler GmbH
- Ing. Wolfgang Stirbl e.U.
- Ing. Wolfsberger Andreas
- Ing. Wolfsgruber Dominik
- Ing. Wolfsgruber Tanja
- Ing. Wolke David Günther Vinzenz
- Ing. Wolkerstorfer Elmar
- Ing. Wollitzer Peter
- Ing. Wolsegger Johann Alois
- Ing. Wratschko Franz
- Ing. Wulz Franz Rudolf
- Ing. Wunderlich Jochen
- Ing. Wurm Uwe Christoph
- Ing. Wurmbauer Hans-Juergen
- Ing. Wurzer Hans-Jürgen
- Ing. Wutte Christian
- Ing. Wöckl Doris
- Ing. Wögerbauer Karl
- Ing. Wölcher Stefan
- Ing. Wölfer Martin
- Ing. Wöll Stefan
- Ing. Wöntner Gebhard
- Ing. Wörz Alexander
- Ing. Wöss Peter
- Ing. Wüger Stefan
- Ing. Wünscher Hannes
- Ing. Wüst Matthias
- Ing. Yamu Yildirim
- Ing. Zalka Martin
- Ing. Zapadlo Gerhard
- Ing. Zapf Thomas
- Ing. Zapfl Gerhard
- Ing. Zaunscherb Gerald Herbert
- Ing. Zechner Andreas
- Ing. Zehentbauer Alexandra
- Ing. Zehetbauer Michael Leopold Josef
- Ing. Zeilbauer Patrick
- Ing. Zeiler Josef
- Ing. Zeiss Lukas
- Ing. Zeithaml Oto
- Ing. Zelinka Wolfgang
- Ing. Zeller Werner
- Ing. Zellhofer Melanie
- Ing. Zelzer Alexander
- Ing. Zelzer Patrick
- Ing. Zemann Ulrike
- Ing. Zenz Alfred Gottfried Clive
- Ing. Zerzer B.A. Eveline
- Ing. Zerzer Stefan
- Ing. Zettel Rene
- Ing. Ziegler Engelbert
- Ing. Zierler Gernot Peter
- Ing. Zierler Karl
- Ing. Zikeli Stefan Robert
- Ing. Zima Alexander
- Ing. Zimmer Andreas Heinrich
- Ing. Zimmerbauer Manuel
- Ing. Zimmermann Christian
- Ing. Zimmermann Thomas
- Ing. Zimprich Paul
- Ing. Zintl-Radutiu Emanuel