| Company | Timeline | Status | |
| Birdsall Group Limited Director • Unreported | 12 Sep 2006←19 Years→Current | Active | |
| Birdsall Air Conditioning Ltd Director • Engineer | 8 Jul 1994←31 Years→Current | Active | |
| Birdsall Networks Limited Director • Engineer | 15 Sep 1990←35 Years→Current | Active | |
