| Rol | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Cargo | Konstruktionsbüro Sieber GmbH | 🇨🇭Switzerland | Activa | 15/8/2022 – presente |
| Cargo | Sieber Logistics AG | 🇨🇭Switzerland | Activa | 27/1/2021 – presente |
| Cargo | Sieber & Liechti GmbH | 🇨🇭Switzerland | Activa | 15/1/2018 – presente |
| Cargo | creato - Genossenschaft für kreative Umweltplanung | 🇨🇭Switzerland | Activa | 12/1/2018 – presente |
| Cargo | Sieber Solutions AG | 🇨🇭Switzerland | Disuelta | 27/11/2024 – presente |
| Cargo | Sieber Solutions AG | 🇨🇭Switzerland | Disuelta | 19/12/2024 – presente |
| Cargo | Sieber Logistics AG | 🇨🇭Switzerland | Activa | 27/11/2024 – presente |
15/8/2022
appointed
27/1/2021
appointed
12/1/2018
appointed