Alle Firmen mit dem Anfangsbuchstaben I
- Ing. Djikic Robert
- Ing. Djordjevic & Djordjevic Bau GmbH
- Ing. Dobritzhofer Sandra
- Ing. Dobrovnik Thomas Harald
- Ing. Doersieb Peter
- Ing. Dohr Patrick
- Ing. Dolar René
- Ing. Doleschal-Linsbauer Karin
- Ing. Dollberger Claudia Christina
- Ing. Doppler Thomas
- Ing. Dopplinger Dominic
- Ing. Dorer Matthias Maria Raphael
- Ing. Dorfner Bernhard
- Ing. Dormann Dieter
- Ing. Dorner Günter
- Ing. Dorner Kurt
- Ing. Dorner Otmar
- Ing. Dornhecker Peter
- Ing. Dorninger Rene
- Ing. Dorninger Stefan
- Ing. Doschek Stephan Maximillian
- Ing. Dott. Atena Andrea
- Ing. Dowitsch Lukas
- Ing. Dr. Anzengruber Hermann
- Ing. Dr. Benes Karl
- Ing. Dr. Birgmayer Peter
- Ing. Dr. Cerny Eva
- Ing. Dr. Christof Walser
- Ing. Dr. Hamid Omar
- Ing. Dr. Harjkova Galina
- Ing. Dr. Hernegger Gerald
- Ing. Dr. Herrmann Lutz
- Ing. Dr. Janovsky Erich
- Ing. Dr. Korc Filip
- Ing. Dr. Lattermann Robert
- Ing. Dr. Martin Weiss, LL.B. LL.M.
- Ing. Dr. Mergenbaum Michael
- Ing. Dr. Mikura Erik
- Ing. Dr. Mikura Erik
- Ing. Dr. Milchrahm Andreas
- Ing. Dr. Nolte Markus
- Ing. Dr. Paris Stefania
- Ing. Dr. Pascher Andreas
- Ing. Dr. Pfeffer Wolfgang
- Ing. Dr. Polleres Eva
- Ing. Dr. Pulay Franz
- Ing. Dr. Roelofsen Julia Maria Katharina
- Ing. Dr. Schwärzler Stefan
- Ing. Dr. Seidl Da Fonseca Ricardo
- Ing. Dr. Stadlbauer Stefan
- Ing. Dr. Stock Joachim
- Ing. Dr. Vögele Thomas Johann
- Ing. Dr. Wildt Steffen
- Ing. Dr.med.vet. Alois Haider
- Ing. Draxler Peter
- Ing. Draxler Wolfgang
- Ing. Dreier David
- Ing. Dressler Bruno
- Ing. Drobesch Christian Markus
- Ing. Drobna Alica
- Ing. Dujmovits Michael Ewald
- Ing. Dullnig Heimo
- Ing. Dundjerski Christoph
- Ing. Durdevic Josip
- Ing. Durmaz Celal
- Ing. Durstmüller Paul
- Ing. Duskanich Manfred
- Ing. Dörflinger Franz
- Ing. Dürauer Fritz
- Ing. Düringer Emil
- Ing. Dürr Franz
- Ing. Düss Bernhard
- Ing. E. Ermler GmbH
- Ing. E. Fuchs Ges.m.b.H.
- Ing. E. Steiner High-Tech Personalbereitstellungs- und Technische Dienstleistungsges.m.b.H
- Ing. Ebenberger Egon Albin
- Ing. Ebenberger Peter
- Ing. Eberhart Jürgen
- Ing. Eberle Dieter
- Ing. Ebinger Karl