Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Mag. Stropp Christian
- Ing. Mag. Tantscher Harald Walter
- Ing. Mag. Tillhof Herbert
- Ing. Mag. Tomasetig Christoph
- Ing. Mag. Vallant Jeanette
- Ing. Mag. Waldl Franz
- Ing. Mag. Weber, LL.M. Lukas
- Ing. Mag. Wegleitner Herbert
- Ing. Mag. Weigl Reinhard
- Ing. Mag. Weiß Helmut
- Ing. Mag. Wiesinger Hermann Franz
- Ing. Mag. Wilhelm Deutschmann, MBA, CTE
- Ing. Mag. Will Rainer Hubert Franz
- Ing. Mag. Zangerle Egon Hubert
- Ing. Mag. Zeller Karl
- Ing. Mag. Zimmermann Stefan
- Ing. Mag. Übellacker Susanne Barbara
- Ing. Mag.(FH) Daniel Kern | Vorsorge Agentur
- Ing. Mag.(FH) Hannes Shamiyeh, MBA
- Ing. Magnet Franz Josef
- Ing. Magula Dusan
- Ing. Mahmodi-Kotnaee Abdolreza
- Ing. Mahr Martina Eveline
- Ing. Mahringer Hans Wolfgang
- Ing. Maier Andreas Peter
- Ing. Maier Dominik Johann
- Ing. Maier Franz
- Ing. Maier Manfred
- Ing. Maimer Peter
- Ing. Mair Thomas
- Ing. Mairzedt Bau GmbH
- Ing. Majcen Baugesellschaft m. B. H.
- Ing. Majcen Baugesellschaft m.b.H.
- Ing. Majcen Baugesellschaft m.b.H.
- Ing. Majcen Baugesellschaft m.b.H.
- Ing. Mak Mario
- Ing. Makas Christian
- Ing. Makoschitz-Weinreich Sebastian Leopold
- Ing. Malek Herbert
- Ing. Malits Andreas
- Ing. Malliga Hans Jörg
- Ing. Mammerler Lukas Franz Siegfried
- Ing. Mandl Christoph Josef
- Ing. Manfred Kernstock GmbH
- Ing. Manfred Leutl
- Ing. Manfred Moravec, Allgemein beeideter und gerichtlich zertifizierter Sachverständiger
- Ing. Manfred Pachernegg KEG
- Ing. Manfred Stephan Höfler
- Ing. Manninger Aleksandra
- Ing. Manthey Michael
- Ing. Manuel Silvestri GmbH
- Ing. Marc Wallner e.U.
- Ing. Marchhart Harald
- Ing. Marco Magedin GmbH
- Ing. Marco Sailer GmbH
- Ing. Marco Schmid - Carl Goluch 1896
- Ing. Margreiter Johann
- Ing. Maringer Adolf
- Ing. Maringer Herbert
- Ing. Marinkovic Milan
- Ing. Mario Wilfinger GmbH & Co KG
- Ing. Marjanovic Goran
- Ing. Marker Harald
- Ing. Markgraf Thomas
- Ing. Marktl Johann
- Ing. Marktl Martin
- Ing. Markus Baier KG
- Ing. Markus Fida
- Ing. Markus Günther
- Ing. Markus Koch GmbH
- Ing. Markus Ondrag - Consulting - Management - Infrastruktur
- Ing. Markus Pöll Steuer- und Regelungstechnik GmbH
- Ing. Markus Sandholzer Bilanzbuchhaltung
- Ing. Markus Steyrer Holding GmbH
- Ing. Markus Weidenauer KFZ-Werkstätte e.U.
- Ing. Markus Zagler e.U.
- Ing. Markusfeld David Paul
- Ing. Martin Dollhäubl - Morphogenetische Feld Technik (MFT)
- Ing. Martin Gruber Bau OG Baumeister
- Ing. Martin Gruber Immo GmbH