| Company | Timeline | Status | |
| Channel Azur Digital Television Plc Director • Business Consultant | 28 Apr 1994←31 Years→9 Sep 2025 | Dissolved | |
| Business Switchboard Limited Director • Management Consultant | 15 Oct 1992←32 Years→5 Nov 2024 | Dissolved | |
| Cable And Satellite Telecommunications Limited Director • Management Consultant | 15 Oct 1991←33 Years→5 Nov 2024 | Dissolved | |
| Castell Computer And Systems Telecommunications Limited Director • Director/consultant | 10 Aug 1991←34 Years→Current | Active | |
| Castell Computer And Systems Telecommunications Limited Director • Director/consultant | 1 Jan 1970←55 Years→1 Apr 2025 | Active | |
