| Company | Timeline | Status | |
| Zero Energy Design Ltd Director • Director | 31 Oct 2012←12 Years→31 Mar 2025 | Active | |
Silcock Leedham Qatar Limited Director • Company Director | 25 Jan 2012←4 Years→7 Jun 2016 | Dissolved | |
| Silcock Leedham Group Ltd Director • Director | 15 Dec 2010←14 Years→31 Mar 2025 | Active | |
| Silcock Leedham Consulting Engineers Limited Director • Director | 2 Sep 2010←14 Years→31 Mar 2025 | Active | |
| SL Libya Limited Director • Company Director | 26 May 2010←10 Years→23 Nov 2020 | Dissolved | |
| Verisys Limited Director • Chartered Engineer | 15 Jan 2010←12 Years→11 Apr 2022 | Active | |
| Upperbank Properties LLP Designated LLP Member • Unreported | 11 Dec 2006←15 Years→10 May 2022 | Dissolved | |
| Mallinson Architects & Engineers Ltd Director • Engineer | 8 Aug 2005←1 Year 1 Month→1 Oct 2006 | Active | |
| Mike And Bill LLP Designated LLP Member • Unreported | 3 Sep 2001←20 Years→10 May 2022 | Dissolved | |
