| Rol | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Cargo | Michu Witschi GmbH | 🇨🇭Switzerland | Activa | 27/9/2017 – presente |
| Cargo | Microtunnel.ch AG | 🇨🇭Switzerland | Activa | 22/9/2020 – presente |
| Cargo | Witschi Immobilien AG | 🇨🇭Switzerland | Activa | 20/6/2019 – presente |
| Cargo | Frischbeton Langenthal AG | 🇨🇭Switzerland | Activa | 15/2/2021 – presente |
| Cargo | Witschi Group AG | 🇨🇭Switzerland | Disuelta | 20/6/2019 – presente |
| Cargo | Witschi Baumanagement AG | 🇨🇭Switzerland | Activa | 20/6/2019 – presente |
| Cargo | Witschi Detox AG | 🇨🇭Switzerland | Activa | 11/8/2017 – presente |
| Cargo | Patronale Stiftung der Firma Friedrich Witschi AG | 🇨🇭Switzerland | Activa | 27/11/2018 – presente |
| Cargo | Stiftung Mühle Langenthal in Liquidation | 🇨🇭Switzerland | Disuelta | 4/1/2018 – presente |
| Cargo | Miphalt AG | 🇨🇭Switzerland | Activa | 24/6/2016 – presente |
| Cargo | Schoio AG | 🇨🇭Switzerland | Activa | 31/7/2023 – presente |
29/1/2025
appointed
11/10/2024
appointed
24/6/2016
appointed