| Company | Timeline | Status | |
| Global Trenching Limited Secretary • Unreported  | 26 Jul 2000←9 Years→12 Aug 2009  | Active  | |
| Mastenbroek Holding Company Limited Secretary • Unreported  | 1 Sep 1999←9 Years→6 May 2009  | Active  | |
| Mastenbroek Limited Secretary • Accountant  | 1 Sep 1999←9 Years→6 May 2009  | Active  | |
