| Company | Timeline | Status | |
| Cambridge Photonics Limited Secretary • Unreported | 26 Sep 2000←5 Years→27 Apr 2006 | Dissolved | |
| Cambridge Correlators Limited Secretary • Unreported | 21 Sep 2000←4 Years→29 Jun 2005 | Dissolved | |
| Orsynetics Limited Secretary • Company Director | 13 May 1997←16 Years→10 May 2013 | Active | |
| Parallel Photonic Systems Limited Director • Director | 16 Oct 1996←16 Years→10 May 2013 | Active | |
| Organic Specialities Limited Director • Company Director | 4 May 1995←18 Years→10 May 2013 | Active | |
| Orsynetics Limited Director • Director | 28 Dec 1990←22 Years→10 May 2013 | Active | |
Casa Chemicals Limited Director • Director | 28 Dec 1990←22 Years→10 May 2013 | Dissolved | |
| Thomas Swan & Co.Limited Director • Director | 28 Dec 1990←14 Years→5 Oct 2005 | Active | |
