| Company | Timeline | Status | |
| Shermann Sound Systems Ltd Director • Engineer | 23 Jan 2017←6 Years→2 May 2023 | Dissolved | |
| Shermann Ltd Director • Engineer | 23 Jan 2017←6 Years→2 May 2023 | Dissolved | |
| Shermann Audio Ltd Director • Engineer | 23 Jan 2017←3 Years→10 Sep 2020 | Active | |
Shermann Manufacturing Ltd Director • Engineer | 19 Aug 2013←5 Years→8 Jan 2019 | Dissolved | |
