Alle Firmen mit dem Anfangsbuchstaben D
- Dipl-Ing. Haberl Reinhold Adolf
- Dipl-Ing. Habersatter Michael
- Dipl-Ing. Hackl Arno Johannes
- Dipl-Ing. Hackl Helga Dorothea
- Dipl-Ing. Haderer Markus
- Dipl-Ing. Hagenauer Klaus
- Dipl-Ing. Hahn Andreas
- Dipl-Ing. Haider Alexander
- Dipl-Ing. Haider Alois
- Dipl-Ing. Hak Axel
- Dipl-Ing. Halb Marita
- Dipl-Ing. Halmetschlager Gerold Peter
- Dipl-Ing. Hamerle Christian
- Dipl-Ing. Hammann Brigitte
- Dipl-Ing. Hammer-Granig Dominik Lorenz
- Dipl-Ing. Hanak Gabriele
- Dipl-Ing. Hancvencl Georg
- Dipl-Ing. Hangler Tobias Franz
- Dipl-Ing. Hanke Michael
- Dipl-Ing. Hans Thoma Gemeinnützige Privatstiftung
- Dipl-Ing. Hanzl Sigrid
- Dipl-Ing. Harrer Heinz
- Dipl-Ing. Hartl Benedikt
- Dipl-Ing. Hartl Franz
- Dipl-Ing. Hartlieb Erich
- Dipl-Ing. Hashemi Farhang
- Dipl-Ing. Hasitschka Peter
- Dipl-Ing. Hastik Thomas
- Dipl-Ing. Hausleitner-Schatz Matthias Franz
- Dipl-Ing. Haussteiner Gerald
- Dipl-Ing. Hegenbart Robert
- Dipl-Ing. Hehenberger Reinhard
- Dipl-Ing. Heim Franz
- Dipl-Ing. Heindl Peter
- Dipl-Ing. Heininger Michael Josef
- Dipl-Ing. Heinz Anglberger
- Dipl-Ing. Heiss Dorothea
- Dipl-Ing. Heistinger Andrea
- Dipl-Ing. Heitzinger Michael
- Dipl-Ing. Heller Werner
- Dipl-Ing. Helmreich Helmut
- Dipl-Ing. Helperstorfer Josef
- Dipl-Ing. Henöckl Christoph
- Dipl-Ing. Herbrich Rainer
- Dipl-Ing. Herbst Daniel
- Dipl-Ing. Herceg-Nachtlberger Judith Hildegard
- Dipl-Ing. Hergovich Astrid
- Dipl-Ing. Hermann Hainzl
- Dipl-Ing. Hermanseder Roland
- Dipl-Ing. Herring-Frankensdorf Elisabeth
- Dipl-Ing. Hersche Bruno
- Dipl-Ing. Herzog Ewelina Anna
- Dipl-Ing. Hillisch Wolfgang
- Dipl-Ing. Hink Franz
- Dipl-Ing. Hinterberger Wilhelm
- Dipl-Ing. Hinteregger Udo
- Dipl-Ing. Hintermeier Günther
- Dipl-Ing. Hipfinger Gunther Herwig
- Dipl-Ing. Hirm Gerhard
- Dipl-Ing. Hirm Iris
- Dipl-Ing. Hirner Heimo
- Dipl-Ing. Hirnschall David
- Dipl-Ing. Hirsch Christian Josef
- Dipl-Ing. Hirsch Michael
- Dipl-Ing. Hirschler Manfred
- Dipl-Ing. Hirschmann Julia
- Dipl-Ing. Hirtner Klaus
- Dipl-Ing. Hloch Johannes
- Dipl-Ing. Hochkofler Michael Andreas
- Dipl-Ing. Hochrainer Andreas
- Dipl-Ing. Hochwartner Bernd
- Dipl-Ing. Hofbauer Elisabeth
- Dipl-Ing. Hofer Daniel
- Dipl-Ing. Hofer Julia
- Dipl-Ing. Hofer Mathias
- Dipl-Ing. Hofer Robert
- Dipl-Ing. Hoffelner Walter
- Dipl-Ing. Hoffmann Jürgen Günther
- Dipl-Ing. Hofinger Daniela
- Dipl-Ing. Hoheiser Maximilian