| Company | Timeline | Status | |
| Oakwood Computing Associates Limited Director • Director | 22 May 2000←23 Years→2 Jan 2024 | Dissolved | |
| Programming Research Limited Director • Director | 10 Sep 1993←4 Years→3 Feb 1998 | Active | |
| Programming Research (1993) Limited Director • Geophysicist | 31 Dec 1992←32 Years→Current | In Receivership | |
