| Company | Timeline | Status | |
| A Aird Associates Limited Director • Engineer | 28 Jan 2016←7 Years→8 Dec 2023 | Dissolved | |
Aird Development Services Ltd Director • Engineer | 24 Jan 2007←13 Years→5 May 2020 | Dissolved | |
| Aird Geomatics Limited Director • Consulting Engineer | 18 Sep 2001←23 Years→20 Dec 2024 | Dissolved | |
Aird Consulting Engineers Limited Director • Engineer | 10 May 1996←22 Years→18 Dec 2018 | Dissolved | |
