| Company | Timeline | Status | |
| S J I Holdings Limited Director • Civil Engineer | 21 Nov 2005←10 Years→1 Mar 2016 | Active | |
| Sir Joseph Isherwood Limited Director • Civil Engineer | 4 Jun 2003←12 Years→1 Mar 2016 | Active | |
| CMN Support Services Limited Director • Engineer | 24 Oct 1994←21 Years→1 Mar 2016 | Active | |
