| Company | Timeline | Status | |
| Rid Management Limited Director • Director | 17 Sep 2009←11 Years→22 Sep 2020 | Active | |
| Filtration Society(The) Director • Scientist | 19 Oct 2004←1 Year 11 Months→3 Oct 2006 | Dissolved | |
| White House (Chester) Limited Director • Particle Scientist | 31 Dec 1991←28 Years→22 Sep 2020 | Active | |
| Movecall Limited Director • Scientist | 25 Sep 1991←9 Years→10 Apr 2001 | Active | |
| White House Scientific Limited Director • Scientist | 10 Sep 1991←29 Years→22 Sep 2020 | Active | |
