Located in the heart of Sion on Route du Manège, Geosat SA is a leading engineering and official surveying firm. Specializing in official surveying, 3D mapping, and monitoring, our firm has provided high-precision solutions since 2001. We welcome you from Monday to Friday, 7:30 AM to 5:00 PM, for all your needs in geoinformatics, rural development, and civil engineering. ISO 9001 and 14001 certified, Geosat SA guarantees sustainable and innovative expertise for public and private infrastructure in Valais.

Aetherys is an engineering and consulting firm specializing in heating, ventilation, air conditioning, and plumbing (HVAC&P) based in Martigny, Valais. The company assists homeowners, architects, developers, and contractors in the design and optimization of their technical systems throughout French-speaking Switzerland. Aetherys offers customized solutions for single-family homes, residential buildings, and administrative and industrial structures, integrating energy efficiency, sustainability, and user comfort. Each project is carefully analyzed to ensure reliable, cost-effective systems that comply with current standards. The firm is involved in all phases of the project, from feasibility studies and design to sizing, planning, and construction supervision. Aetherys places particular emphasis on the energy optimization of buildings through modern solutions such as heat pumps, solar energy, heat recovery, and high-performance ventilation systems. With over 15 years of experience in building technology, Aetherys possesses solid expertise in a wide range of projects, from single-family homes to luxury chalets in resort areas, as well as commercial buildings and public infrastructure. Based in Martigny, the company operates throughout the Valais region as well as in the Chablais and the Vaud Riviera, offering a responsive, results-oriented local approach. Aetherys positions itself as a trusted partner for all HVAC projects in French-speaking Switzerland, providing high-performance, sustainable solutions tailored to today’s building industry challenges.