Hans Rudolf Keller

Managing director · sole signature · Bolligen

Director · joint signature by two · Bern

Managing director · sole signature · Bolligen

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

Managing director · joint signature by two · Zürich

Member of the executive board · joint signature by two · Köniz

Secretary of the board of directors · joint signature by two · Olten

Director · joint signature by two · Olten