| Company | Timeline | Status | |
| Expert Consultation Ltd Director • Chartered Surveyor | 1 May 2025←6 Months→Current | Active | |
| Express Consultation Ltd Director • Project Manager | 16 Jan 2023←1 Year 6 Months→30 Jul 2024 | Dissolved | |
| Greg Johnstone Ltd Director • Chartered Surveyor | 28 Aug 2014←8 Years→11 Jul 2023 | Dissolved | |
Greg Johnstone Consultant Limited Director • Building Surveyor | 9 Mar 2007←8 Years→18 Aug 2015 | Dissolved | |
