| Company | Timeline | Status | |
Conetiver Contracts Limited Director • Director | 9 Mar 2009←6 Years→16 Jun 2015 | Dissolved | |
| W.J. Hartnell Contracts Limited Director • Architect | 20 Aug 2002←23 Years→Current | Active | |
| Hartnell Estates Limited Director • Architect | 20 Jun 1999←26 Years→Current | Active | |
| Inspiral Developments Limited Director • Architect | 15 Sep 1998←27 Years→Current | Active | |
Simon Design & Build Limited Director • Architect | 15 Sep 1998←15 Years→26 May 2014 | Dissolved | |
| Simon Matthew & Co Limited Director • Architectural Services | 31 Mar 1992←33 Years→Current | Active | |
