Cornelius Rhomberg

• Development of the Bregenz harbour
• Bregenz district commission
• Herz-Jesu church Bregenz
• Höchst parish church

Walter Rhomberg

• Rheintal motorway
• Gebhardsberg
• Hohenems quarry
• Wolfurt goods station
• Establishment of Bahnbau Wels GmbH (BBW)

Walter-Heinz Rhomberg

• Bregenz festival hall
• Property development business/Seepark estate
• Bregenz arts house
• Tivoli Stadium
• Industrial buildings: Head, KIKA, Doppelmayr
• Business parks: Rhomberg's factory, Benger Park
• Enlargement of Rhomberg Bau GmbH
  - Establishment of Express Beton GmbH & Co KG (1987)
  - Establishment of MIGU Asphaltbau GmbH (1991)
  - Establishment of Rhomberg Bau AG (former Montanin AG) (1970)
  - Establishment of Goldbeck Rhomberg GmbH (2001)
• Complete acquisition of Bahnbau Wels GmbH (1999)
• Certification after ISO QS 9001 (1996)

Hubert Rhomberg

• Fixed tracks on Wolfgruben tunnel, Arlberg tunnel (A)
• ICE section Cologne – Rhine - -Main (D)
• New section Mattstetten - Rothrist (CH)
• Railway technology - Lötschberg tunnel (CH)
• Total contractor–WESTside Bern project (CH)
• Sandgrubenweg Bregenz housing area (A)
• Establishment of Goldbeck Rhomberg GmbH
• Establishment of Wirkungsgrad Energieservice
• Establishment of Rhomberg Bahntechnik GmbH