| Company | Timeline | Status | |
| Tri-Air Innovations Ltd Director • Engineer | 1 Feb 2011←14 Years→Current | Active | |
| Innovent (Scotland) Ltd Director • Ventilation Engineer | 1 Apr 2005←3 Years→15 Jul 2008 | Active | |
| Specialist Ventilation Services Limited Director • Ventilation Engineer | 6 Jan 1998←27 Years→Current | Active | |
