| Company | Timeline | Status | |
| Haberdashers' Aske's Federation Trust Director • University Lecturer | 1 Sep 2009←8 Years→27 Mar 2018 | Active | |
| Synoptics Limited Director • Research Fellow | 3 Oct 1992←13 Years→15 Dec 2005 | Active | |
| Graticules Optics Limited Director • Research Fellow | 31 Oct 1991←14 Years→12 Jan 2006 | Active | |
