Perreten & Milleret SA is a consulting engineering firm, founded in 1955. 

It provides engineering services in the following fields:

• Civil engineering (road development, sewage networks, outdoor development)
• Structures bconcrete, steel, wood (buildings - industrial, housing, administrative, medical)
• Artworks 
• Environment (building physics, detection of hazardous materials, asbestos-lead-PCB surveys, waste management, soil and water management, environmental monitoring).
• Geotechnics (special works).

The office is run by the two partners, Julien Treleani and Marc Lachenal, as well as the director of the civil engineering sector, Jean-Jacques Mégevand. It currently employs around forty people, with 2 apprentices. 

Our office is very sensitive to the desire expressed by our customers to build structures that are exemplary in environmental terms. We fully share this concern and can testify to our commitment in this area with ISO 14001 certification. Combined with our ISO 9001 quality management system, combining creativity, understanding and design of the projects to be carried out, it enables us to guarantee our customers services that are not only first-rate, but also exemplary with regard to the environmental aspects that rightly concern them, particularly in terms of sustainable development, use of materials and site planning. As for ISO 45001 certification, obtained since 2018, this attests to our rigorous management of health and safety in the workplace.

Our involvement in large-scale projects, as well as frequent collaborations with specialist companies, have enabled us to forge practical, pragmatic experience based on solid knowledge. Constant development and ongoing training cement our knowledge base, which we use day after day to achieve and satisfy our customers' objectives. The skills and experience of our civil engineers, but also those of our draughtsmen and works managers, enable us to meet the requirements of mandates during all phases of the project, from consultancy to design, from modelling to implementation and controls.