Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Tschandl Peter
- Ing. Tschann Klemens Ludwig
- Ing. Tschermanek Martin
- Ing. Tscherne Roland
- Ing. Tscherner Anton
- Ing. Tschida Arnold Michael
- Ing. Tschiltsch Mario
- Ing. Tschinderle Ulrich
- Ing. Tschirk Gerhard
- Ing. Tschögl Robert
- Ing. Tumer Mario
- Ing. Turner Robert
- Ing. Uedl David
- Ing. Uitz Günther Baugesellschaft m.b.H.
- Ing. Ukobitz Stefan
- Ing. Ulm Karl-Heinz
- Ing. Ulrich Gilbert Norbert
- Ing. Undesser Manuel
- Ing. Unger Christian
- Ing. Unger Manuel
- Ing. Unger Markus
- Ing. Unterdechler Ingo
- Ing. Unterrainer Peter
- Ing. Unterraßner Christoph
- Ing. Unterweger Gerald
- Ing. Urban Florian Sebastian Benjamin
- Ing. Urbanek Richard Bernd
- Ing. Urbanich Herbert
- Ing. Urschler Bernd
- Ing. Utri Andreas
- Ing. Uygun Burak
- Ing. Vaclavik Premysl
- Ing. Vakhiev Salman
- Ing. Valentan Wolfgang
- Ing. Van Dam Martin
- Ing. Varga Peter
- Ing. Vehovec Volker
- Ing. Vejprava Thomas
- Ing. Velic Mladen
- Ing. Veselsky Jakub
- Ing. Vieregg Armin Helmut
- Ing. Viktor Gusel GesmbH
- Ing. Virag Gabor
- Ing. Vockenhuber Robert Ernst
- Ing. Vogl Stefan
- Ing. Vogt Michael
- Ing. Vollenhofer Rene
- Ing. Vonasek Stefan
- Ing. Voppichler Johannes Lukas
- Ing. Vormündl Rene
- Ing. Vornwagner Roland
- Ing. Vorstandlechner Werner
- Ing. Vosatka Thomas
- Ing. Vostinakova Klara
- Ing. Vrecl Milan
- Ing. Vrzal Christoph Peter
- Ing. Vujicic Luka
- Ing. Vukovic Aldin
- Ing. Vyskocil Peter Christian
- Ing. VÖLKER Martin
- Ing. Vögerle Ernest Bernd
- Ing. Völker Michael
- Ing. Vötter Benjamin Hartmann
- Ing. W Baumgartner GesmbH & Co KG
- Ing. W. Baumgartner Gesellschaft m.b.H.
- Ing. W. Gangl KG
- Ing. W. Hutfless Klimatechnik GmbH
- Ing. W. Reicher Winterdienste - Grünanlagenpflege GmbH
- Ing. Wabnegg Robert Kurt David
- Ing. Wabnig Gerhard
- Ing. Wachschütz Christian
- Ing. Wachter Peter
- Ing. Wagenleitner Franz
- Ing. Wagesreither Martin
- Ing. Wagner Arian Aris
- Ing. Wagner Fritz
- Ing. Wagner Klemens
- Ing. Wagner Martin
- Ing. Wagner Martin Reinhard
- Ing. Wagner Matthias