S+N Ingénieurs is a design office working in the fields of civil and environmental engineering such as:

• Civil engineering and public works.
• Structures.
• Environmental protection, particularly noise pollution.
• Expertise, network management, multidisciplinary studies, transformation and maintenance of civil engineering structures and buildings.
• Collaboration in regional planning studies.

The office was founded on January 1, 1995, with its headquarters in Lausanne.
It grew out of the Schopfer et Karakas SA office founded in 1964 in Lausanne for civil engineering, structures and environmental studies services.