| Company | Timeline | Status | |
| Airtech Limited Secretary • Director | 19 Feb 1997←21 Years→19 Oct 2018 | Active | |
| Airtech (Service & Maintenance) Limited Director • Company Director | 23 Nov 1992←33 Years→Current | Active | |
| Airtech Air Conditioning Services Limited Director • Company Director | 31 Jan 1991←34 Years→Current | Active | |
| Airtech (Service & Maintenance) Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
