| Company | Timeline | Status | |
| System Five Off-Site Ltd Director • Director | 2 Nov 2018←3 Years→11 Jul 2022 | Active | |
| Robertryan Homes Limited Director • Director | 2 Nov 2018←3 Years→11 Jul 2022 | Active | |
| Robertryan Timber Engineering Limited Director • Director | 2 Nov 2018←3 Years→11 Jul 2022 | Active | |
| R.D.K. Construction Limited Director • Director | 2 Nov 2018←3 Years→11 Jul 2022 | Active | |
| Ayrshire & Arran Destination Alliance Limited Director • Director | 13 Sep 2018←6 Years→27 May 2025 | Dissolved | |
| LJS Ayrshire Ltd Director • Director | 2 Mar 2017←8 Years→Current | Active | |
| Simpson Developments (Ayrshire) Ltd Director • Director | 22 Dec 2016←8 Years→Current | Active | |
| M & K Simpson Limited Director • Director | 30 Mar 2015←10 Years→Current | Active | |
| Ayrshire & Arran Golf Partnership Ltd Director • Director | 1 Sep 2014←9 Years→30 Sep 2023 | Active | |
| Ayrshire College Foundation Director • None | 17 Mar 2014←6 Years→4 Aug 2020 | Active | |
