| Company | Timeline | Status | |
| RPS Heritage Holdings Limited Director • Company Director | 13 Nov 2018←3 Years→4 Jul 2022 | Dissolved | |
| RPS Heritage Limited Director • Company Director | 13 Nov 2018←3 Years→4 Jul 2022 | Dissolved | |
| RPS Ireland Limited Director • Company Director | 13 Nov 2018←3 Years→4 Jul 2022 | Active | |
| Tetra Tech Consulting Limited Director • Company Director | 13 Nov 2018←3 Years→4 Jul 2022 | Active | |
| Trett Contract Services Limited Director • Managing Director | 1 Jun 2011←11 Months→11 May 2012 | Active | |
R P + K International Limited Director • Managing Director | 10 Feb 2011←5 Years→20 Sep 2016 | Dissolved | |
| Roger Preston Group Limited Director • Managing Director | 1 Nov 2010←5 Years→20 Sep 2016 | Active | |
| Trett Holdings Limited Director • Managing Director | 1 Nov 2010←1 Year 6 Months→11 May 2012 | Active | |
Whitelaw Turkington Landscape Architects Limited Director • Managing Director | 1 Nov 2010←5 Years→20 Sep 2016 | Dissolved | |
| Sweco UK Limited Director • Managing Director | 1 Nov 2010←5 Years→31 Aug 2016 | Active | |
