Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Gleiss Gerald Otto
- Ing. Gloss Robert
- Ing. Gluschitz Christopher
- Ing. Gläser Philipp
- Ing. Glössl Marianne
- Ing. Glück Norbert
- Ing. Gmeiner Heinz
- Ing. Goißer Walter Alfred Karl
- Ing. Golda Robert
- Ing. Goldenits Richard
- Ing. Golec Markus
- Ing. Golesch Gerald
- Ing. Gollmayer Wolfgang
- Ing. Gollop Erich Peter
- Ing. Gollubits Günter Viktor
- Ing. Golser GmbH
- Ing. Goschler Roman
- Ing. Gosterxeier Daniel Ernst
- Ing. Gottfried Pschill KG
- Ing. Gottlieb OG
- Ing. Gottzy, BSc. Ewald
- Ing. Graber Josef
- Ing. Grabmayer Roman
- Ing. Grabmüller Heimo
- Ing. Grabovac & Peric KEG
- 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. Grass Alfred
- Ing. Grassberger Michael
- Ing. Grasser Gerald
- Ing. Grassl Elwin Markus
- Ing. Grath Josef Markus
- Ing. Gratt Andreas
- Ing. Gratz Michael
- Ing. Graup Dietmar
- Ing. Graßmann Michael
- Ing. Greiner Franz
- Ing. Greiner Josef
- Ing. Greiner Wolfgang
- Ing. Greinix Andreas Reinhold
- Ing. Griebaum Peter
- Ing. Griesbacher Johannes
- Ing. Grießer Harald
- Ing. Grießer Roland
- Ing. Gril Rudolf
- Ing. Grill Nicholas
- Ing. Grill Rudolf Franz
- Ing. Grillberger Alexander
- Ing. Grillenberger Reinhard
- Ing. Grillnberger Thomas
- Ing. Grischany Robert
- Ing. Gritsch Clemens
- Ing. Groiss Markus
- Ing. Groiß Lukas Helmut
- Ing. Gromek Walter
- Ing. Gross Stefan
- Ing. Grossauer Stefan
- Ing. Groß Dominik
- Ing. Groß Thomas
- Ing. Großauer Rudolf
- Ing. Grubanovits Helmut
- Ing. Grube Günter
- Ing. Gruber Bernhard Paul
- Ing. Gruber Christoph Peter
- Ing. Gruber Claudia
- Ing. Gruber Elias
- Ing. Gruber Erich
- Ing. Gruber Georg Josef
- Ing. Gruber Joachim
- Ing. Gruber Johannes
- Ing. Gruber Leopold
- Ing. Gruber Martin Johannes
- Ing. Gruber Melanie
- Ing. Gruber Monika