| Rol | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Cargo | Ringger Revisions AG in Liquidation | 🇨🇭Switzerland | Disuelta | 28/9/2016 – presente |
| Cargo | Ringger Treuhand AG | 🇨🇭Switzerland | Activa | 28/9/2016 – presente |
| Cargo | Täfern-Verwaltungs AG | 🇨🇭Switzerland | Disuelta | 1/11/2018 – presente |
| Cargo | S. Blaser Holding AG | 🇨🇭Switzerland | Activa | 8/12/2020 – presente |
20/9/2023
appointed
16/8/2019
appointed