Since its creation in 1979 under the name Fernando Herrera, then Ott et Uldry Sàrl, and today OU3 SA, our engineering office has always placed people at the heart of its business. Led today by John Wuest, Vivien Duhem Khojoyan and Yannick Mathieu, we are a close-knit and passionate team, dedicated to innovation and continuous improvement.

We firmly believe that the success of our projects relies on close collaboration and careful listening to our customers' needs. Our commitment to creating a harmonious working environment fosters team cohesion and enables us to achieve technical excellence.

At OU3 SA, we are committed to offering innovative, customized solutions, while striving for constant improvement in our practices. Join us to benefit from our expertise and collaborative approach, and together, let's bring your projects to life with efficiency and sustainability.

Structural Engineering

New buildings, elevations, conversions, restoration of protected buildings, energy improvements.

- Structural Design

- 3D Modeling, Analysis and Calculation

- Materials Optimization, sustainable approach and promotion of re-use

- Establishment of tenders, financial management

- Project execution and works monitoring

Civil engineering

- Design and construction of structures

- Roads

- Outdoor development projects - public and private spaces

- Project, coordination and management of networks and services and sanitation.

- Stormwater management techniques

- Special works, civil engineering : micro TBM, directional drilling, cut-and-cover, excavation shoring, ...

- Feasibility studies

- Tenders

- Execution and monitoring of works

Works management

- Site supervision

- Project management

- Quality assurance