Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Burtscher Andreas Leopold
- Ing. Burtscher Gesellschaft m.b.H.
- Ing. Buschek Sebastian
- Ing. Buttinger Peter
- Ing. Buxer-Knautz Ingeborg
- ING. BÜRGER TECHNOLOGY GesmbH Toyota Vertragshändler
- Ing. Bäck Thomas
- Ing. Bär Roland
- Ing. Bärntatz Hermann Matthias
- Ing. Bärnthaler Hannes
- Ing. Böck Catherina
- Ing. Bögl Michael
- Ing. Böhler-Huber Andreas
- Ing. Böhm Christian
- Ing. Böhm Franz
- Ing. Böhm Reinhard
- Ing. Böhm Werner
- Ing. Bötscher Marlies
- Ing. Bühler Robert
- Ing. Bürger Manuela
- Ing. Bürger Roman
- Ing. Bürgmann Friedrich
- ing. büro längle gmbh - Planungsbüro f. Energieerzeugungsanlagen
- Ing. Canonica Seto Gertrud
- Ing. Cap Johannes
- Ing. Catic Alija
- Ing. Celik Galip
- Ing. Cepak Christoph
- Ing. Cerny Thomas
- Ing. Cetin Ramazan
- Ing. Chen Ming-Jeng
- Ing. Christ Erich
- Ing. Christ Gerald
- Ing. Christandl Dieter Josef
- Ing. Christandl Nina Maria
- Ing. Christian Aichmair KG
- Ing. Christian Albl GesmbH
- Ing. Christian Binder
- Ing. Christian Bucher
- Ing. Christian Böhm
- Ing. Christian Demmerer
- Ing. Christian Frisch Licht-Maste & Kommunalbeleuchtung
- Ing. Christian Janetschek e.U.
- Ing. Christian Kügerl perfect solutions e. U.
- Ing. Christian Losert e.U.
- Ing. Christian Losert e.U.
- Ing. Christian Mayerhofer GmbH
- Ing. Christian Mikula GmbH
- Ing. Christian Peter Fischer Golfperformance e.U.
- Ing. Christian Schaufler Bau GmbH
- Ing. Christian Spiess GesmbH
- Ing. Christian Tuder Wertstoffhandel eU
- Ing. Christian Werfring CW-3D
- Ing. Christian Winterer WIKO Austria Gemeinschafts TV Anlagen
- Ing. Christian Winterer, Dipl. Mentaltrainer
- Ing. Christoph Hutterer GmbH
- Ing. Christopher Grössing
- Ing. Cibulka Betriebs- u. Büroeinrichtungen GmbH
- Ing. Cimzar Harald
- Ing. Clarissa Elsner
- Ing. Claus Lechner und Christoph Lechner GesbR
- Ing. Clavora Jochen Gerhard
- Ing. Cochlar Karl
- Ing. Coskun Mevlüt
- Ing. Cotes Freyle Maria Jose
- Ing. Csuri-Balogh Vilmos
- Ing. Czeczil Christian
- Ing. Dabrowski Krzysztof Damian
- Ing. Dagdelen Recep
- Ing. Dagn Richard
- Ing. Dallinger Markus
- Ing. Daniel Zupan GmbH
- Ing. Danner Engelbert
- Ing. Dannerbauer Harald
- Ing. Danzer Alfred
- Ing. Danzinger Erwin
- Ing. Daschner Martin
- Ing. Dastl Sascha
- Ing. Datko Marian
- Ing. Daubek-Puza Wolfram