| Company | Timeline | Status | |
| Bam Design Limited Director • Architect | 29 Jul 2020←5 Years→Current | Active | |
| Caledonia Limited Director • Director | 30 Jun 2005←1 Year 5 Months→1 Dec 2006 | Active | |
| JMP Studio Limited Director • Company Director | 1 Jan 2002←4 Years→1 Dec 2006 | Dissolved | |
| John McAslan & Partners Limited Director • Company Director | 1 Jan 2002←4 Years→1 Dec 2006 | Active | |
| Troughton McAslan Limited Director • Company Director | 1 Jan 2002←4 Years→1 Dec 2006 | Dissolved | |
