| Company | Timeline | Status | |
| David L Walker Limited Director • Surveyor | 21 May 2009←16 Years→Current | Active | |
| David L Walker Limited Secretary • Surveyor | 21 May 2009←16 Years→Current | Active | |
| Tarmac Limited Director • Surveyor | 12 Sep 2005←2 Months→11 Nov 2005 | Active | |
