| Company | Timeline | Status | |
| Integra Surveys LLP Designated LLP Member • Unreported | 26 Mar 2025←8 Months→Current | Active | |
| Redhouse Road Management Company Limited Director • Building Engineer | 1 Jan 2025←11 Months→Current | Active | |
| David Smith Associates LLP Designated LLP Member • Unreported | 16 Dec 2022←2 Years 11 Months→Current | Active | |
| Dsa Group Limited Director • Consultant Engineer | 5 Nov 2002←23 Years→Current | Active | |
Dsa Rail Limited Director • Structural Engineer | 29 Oct 2002←11 Years→15 Jul 2014 | Dissolved | |
| Infrastructure Gateway Limited Director • Structural Engineer | 26 Sep 2002←2 Years 10 Months→28 Jul 2005 | Active | |
