| Role | Company | Country | Status | Date Range |
|---|---|---|---|---|
| Officer | Josef Birrer Bauunternehmung GmbH | 🇨🇭Svizzera | Active | 29/06/2023 – present |
| Officer | Birrer Schreinerei Holzbau AG | 🇨🇭Svizzera | Active | 05/11/2024 – present |
| Officer | TR Birrer Swiss Projekt GmbH | 🇨🇭Svizzera | Active | 24/09/2025 – present |
29/06/2023
appointed