| Role | Company | Country | Status | Date Range |
|---|---|---|---|---|
| Officer | Michu Witschi GmbH | 🇨🇭Svizzera | Active | 27/09/2017 – present |
| Officer | Microtunnel.ch AG | 🇨🇭Svizzera | Active | 22/09/2020 – present |
| Officer | Witschi Immobilien AG | 🇨🇭Svizzera | Active | 20/06/2019 – present |
| Officer | Frischbeton Langenthal AG | 🇨🇭Svizzera | Active | 15/02/2021 – present |
| Officer | Witschi Group AG | 🇨🇭Svizzera | Dissolved | 20/06/2019 – present |
| Officer | Witschi Baumanagement AG | 🇨🇭Svizzera | Active | 20/06/2019 – present |
| Officer | Witschi Detox AG | 🇨🇭Svizzera | Active | 11/08/2017 – present |
| Officer | Patronale Stiftung der Firma Friedrich Witschi AG | 🇨🇭Svizzera | Active | 27/11/2018 – present |
| Officer | Stiftung Mühle Langenthal in Liquidation | 🇨🇭Svizzera | Dissolved | 04/01/2018 – present |
| Officer | Miphalt AG | 🇨🇭Svizzera | Active | 24/06/2016 – present |
| Officer | Schoio AG | 🇨🇭Svizzera | Active | 31/07/2023 – present |
29/01/2025
appointed
11/10/2024
appointed
24/06/2016
appointed