Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Gleiss Gerald Otto
- Ing. Gluschitz Christopher
- Ing. Gläser Philipp
- Ing. Glössl Marianne
- Ing. Gmeiner Heinz
- Ing. Goißer Walter Alfred Karl
- Ing. Gold Manfred Wolfgang
- Ing. Golda Robert
- Ing. Goldenits Richard
- Ing. Golec Markus
- Ing. Golesch Gerald
- Ing. Gollubits Günter Viktor
- Ing. Golser GmbH
- Ing. Gombotz Hanspeter
- Ing. Goschler Roman
- Ing. Gosterxeier Daniel Ernst
- Ing. Graber Josef
- Ing. Grabmayer Roman
- Ing. Grabmüller Heimo
- Ing. Grabovac & Peric KEG
- Ing. Gradwohl Roman
- Ing. Graf Heinz
- Ing. Graf Hermann
- Ing. Graf Martin Karl
- Ing. Graf Robert
- Ing. Graf-Mickl Eveline
- Ing. Grafl Klaus
- Ing. Gram Beteiligungs-KG
- Ing. Gramm Gerald
- Ing. Grassberger Michael
- Ing. Grassl Elwin Markus
- Ing. Grath Josef Markus
- Ing. Gratt Andreas
- Ing. Gratz Michael
- Ing. Grausam Michael
- Ing. Graßmann Michael
- Ing. Greiner Franz
- Ing. Greiner Josef
- Ing. Greiner Michael Heinz
- Ing. Greiner Wolfgang
- Ing. Greinix Andreas Reinhold
- Ing. Greß Patrick
- Ing. Griebaum Peter
- Ing. Griesbacher Johannes
- Ing. Gril Rudolf
- Ing. Grill Rudolf Franz
- Ing. Grillberger Alexander
- Ing. Grillnberger Thomas
- Ing. Grinschgl Johannes Erwin
- Ing. Grischany Robert
- Ing. Gritsch Clemens
- Ing. Grohmann Danny
- Ing. Groiss Markus
- Ing. Gromek Walter
- Ing. Gross Friedrich Ludwig
- Ing. Gross Stefan
- Ing. Groß Dominik
- Ing. Großauer Rudolf
- Ing. Grubanovits Helmut
- Ing. Gruber Andreas
- Ing. Gruber Bernhard Paul
- Ing. Gruber Christoph Albert
- Ing. Gruber Christoph Peter
- Ing. Gruber Daniel Gerhard
- Ing. Gruber Elias
- Ing. Gruber Erich
- Ing. Gruber Georg Josef
- Ing. Gruber Johannes
- Ing. Gruber Leopold
- Ing. Gruber Thomas
- Ing. Gruber Wilhelm Johannes
- Ing. Gruber-Veit Marlen
- Ing. Gruböck Christian
- Ing. Grundhammer Karl
- Ing. Gröber Christoph Stefan
- Ing. Grübl Thomas
- Ing. Grünbichler Richard
- Ing. Grüner Bertram
- Ing. Grünsteidl Manfred
- Ing. Gsandtner Henrieta