Neidhardt Grundbau GmbH Novo Hamburgo, Germany Civil and underground engineeringSubsoil exploration, geotechnicalCanalisation
OTEP Saint-Gaudens, France Consulting engineers for road constructionRoad-building materialsConstruction machinery
Aarsleff Grundbau GmbH Novo Hamburgo, Germany Civil and underground engineeringSpecial underground constructionPile foundation (services)
Dieter Häselbarth e.K. Kretzschau, Germany Civil and underground engineeringWell installation constructionWell sinking