| Company | Timeline | Status | |
| Hartnell Estates Limited Director • Civil Engineer | 31 Dec 1992←26 Years→22 Aug 2019 | Active | |
| Simon Matthew & Co Limited Director • Engineer And Surveyor | 31 Mar 1992←27 Years→22 Aug 2019 | Active | |
| W.J. Hartnell Contracts Limited Director • Civil Engineer | 31 Dec 1991←27 Years→22 Aug 2019 | Active | |
| W.J. Hartnell (Builders) Ltd Director • Civil Engineer | 31 Dec 1991←27 Years→22 Aug 2019 | Active | |
| Hartnell Residential Ltd Director • Civil Engineer | 31 Dec 1990←28 Years→22 Aug 2019 | Active | |
