| Company | Timeline | Status | |
Harrison Engineering Consultants Limited Director • Mechanical Engineer | 19 May 1999←21 Years→22 Sep 2020 | Dissolved | |
| Specialist Advisory Services Limited Director • Mechanical Engineer | 25 Feb 1991←6 Years→13 Feb 1998 | Active | |
| Specialist Advisory Services Limited Director • Unreported | 1 Jan 1970←28 Years→13 Feb 1998 | Active | |
