| Company | Timeline | Status | |
| Mastenbroek Environmental Limited Director • Drainage Machine Engineer | 20 Nov 2017←4 Years→30 Sep 2022 | Active | |
| Global Trenching Limited Director • Director | 28 Mar 2002←20 Years→30 Sep 2022 | Active | |
| Mastenbroek Holding Company Limited Director • Company Director | 6 Dec 1996←25 Years→30 Sep 2022 | Active | |
| Mastenbroek Limited Director • Drainage Machine Engineer | 21 Jun 1991←31 Years→30 Sep 2022 | Active | |
