Guillaume Steiner

citizen of Morschach, Val-de-Ruz

Commercial register

Constructions Métalliques Steiner S.A.

Member of the board of directors · joint signature by two · La Chaux-de-Fonds

since Jan 15, 2026
GSTE Holding Sàrl

Managing director · Partner · sole signature · La Chaux-de-Fonds

since Dec 15, 2025