| Company | Timeline | Status | |
| Qualfab Holdings Limited Director • Director | 29 Nov 2017←6 Years→29 Oct 2024 | Active | |
| Van Tongeren Projects Limited Director • Engineer | 30 Oct 2007←14 Years→30 Nov 2021 | Dissolved | |
| Qualfab Limited Director • Manager | 6 May 2003←21 Years→29 Oct 2024 | Active | |
| Van Tongeren International Limited Director • Engineer | 2 Nov 1992←32 Years→29 Oct 2024 | Active | |
