| Company | Timeline | Status | |
Delta Drop Limited Director • Consultant Engineer | 28 Sep 2012←1 Year 7 Months→6 May 2014 | Dissolved | |
| Davis Scientific Treatments Limited Director • Consultant Engineer | 19 Sep 2012←13 Years→Current | Active | |
Williamson Interface (Scientific Consultants) Limited Secretary • Unreported | 11 Dec 2006←8 Years→25 Sep 2015 | Dissolved | |
| Elkstone Waste Management C.I.C Director • Consultant | 7 Oct 2000←21 Years→10 Feb 2022 | Active | |
Williamson Interface (Scientific Consultants) Limited Director • Engineer | 1 Jan 2000←15 Years→25 Sep 2015 | Dissolved | |
