| Company | Timeline | Status | |
Ronachan Limited Director • Architect | 16 Mar 2018←1 Year 5 Months→20 Aug 2019 | Dissolved | |
| Coltart Earley Limited Director • Architect | 10 Oct 2000←25 Years→Current | Active | |
| Coltart Earley Limited Secretary • Architect | 10 Oct 2000←25 Years→Current | Active | |
| Coltart Earley Limited Director • Architect | 10 Oct 2000←23 Years→31 May 2024 | Active | |
| Coltart Earley Limited Secretary • Architect | 10 Oct 2000←23 Years→31 May 2024 | Active | |
