| Company | Timeline | Status | |
| Pallmall (UK) Limited Director • Research Scientist | 14 Mar 2005←20 Years→Current | Active | |
| Picturecall Limited Director • Research Scientist | 13 Sep 1995←30 Years→Current | Active | |
| Spectrum Software (UK) Limited Director • Scientist | 31 Aug 1994←31 Years→Current | Active | |
| Procad Systems (UK) Limited Director • Scientist | 31 Aug 1994←31 Years→Current | Active | |
