André Sierro SA
Civil Engineering & Infrastructure · Sion, Valais
André Sierro SA is a Swiss civil engineering & infrastructure company based in Sion, Canton of Valais (UID CHE-105.907.557).
Board members & signatories
- Nicole Sierro — Mitglied des Verwaltungsrates
- Benoît Mariéthoz — Mitglied des Verwaltungsrates
- Marc Bruhin
Registered purpose
Entreprise de constructions intégrales et de travaux publics ainsi que toutes activités s'y rapportant directement ou indirectement…
Source: Swiss commercial register (Zefix / SOGC) and Alpintel analysis · Data as of March 2026
What André Sierro does
OFFERING
André Sierro SA provides services in masonry and civil engineering, focusing on public and private building projects, renovations, and outdoor landscaping. The company operates through three main divisions: masonry and concrete, civil engineering, and real estate development.
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