Stefan Keller

citizen of Kirchberg (SG), Bussnang

Commercial register

Managing director · joint signature by two · Zürich

since Jan 22, 2026

Chair of the board of directors · joint signature by two · Zürich

since Jan 12, 2026

Member of the board of directors · sole signature · Sirnach

since Jun 15, 2012

Member of the board of directors · sole signature · Sirnach

since Nov 18, 2004

Member of the board of directors · joint signature by two · Zürich

Member of the executive board · joint signature by two

until Mar 24, 2026

Managing director · sole signature · Staufen

Managing director · sole signature

until May 7, 2025

Managing director · joint signature by two · Lupfig

until Aug 26, 2016