| Company | Timeline | Status | |
Castillium Limited Director • Director | 19 Apr 2013←4 Years→2 May 2017 | Dissolved | |
Castle Power Limited Director • Director | 20 Dec 2012←5 Years→8 May 2018 | Dissolved | |
| Castle Contracting (Civil Engineering) Limited Director • Civil Engineer | 23 Jan 2006←15 Years→27 Apr 2021 | Dissolved | |
| Castle Contracting (Structural Repairs) Limited Director • Civil Engineer | 23 Jan 2006←15 Years→27 Apr 2021 | Dissolved | |
| Castle Contracting (Coatings) Limited Director • Civil Engineer | 23 Jan 2006←15 Years→27 Apr 2021 | Dissolved | |
| Castle Group Scotland Limited Director • Civil Engineer | 18 Jan 2006←15 Years→29 Apr 2021 | Active | |
| Castle Composites Limited Director • Civil Engineer | 11 Mar 1998←1 Year 11 Months→24 Feb 2000 | Active | |
| Specialist Contracting (Realisations) Limited Director • Civil Engineer | 30 Nov 1993←27 Years→27 Apr 2021 | Dissolved | |
