| Company | Timeline | Status | |
| Castle Construction Products Limited Director • Accountant | 12 Mar 2015←9 Months→31 Dec 2015 | Active | |
| M Plus Recycling Limited Director • Management Accountant | 28 Mar 2001←14 Years→31 Dec 2015 | Dissolved | |
| Castle Environmental Limited Director • Management Accountant | 27 Feb 1998←17 Years→31 Dec 2015 | Active | |
| Castle Oils Limited Director • Management Accountant | 27 Feb 1998←17 Years→31 Dec 2015 | Active | |
| Castle Waste Services Limited Director • Management Accountant | 27 Feb 1998←17 Years→31 Dec 2015 | Active | |
| Castle Environmental Management Limited Director • Management Accountant | 25 Feb 1998←17 Years→31 Dec 2015 | Active | |
| Ciwm Enterprises Ltd Secretary • Unreported | 15 Dec 1995←4 Months→30 Apr 1996 | Active | |
| Institute Of Wastes Management Secretary • Unreported | 11 Dec 1995←4 Months→30 Apr 1996 | Active | |
