| Company | Timeline | Status | |
| Sailplan Limited Director • Designer | 22 Dec 2004←21 Years→Current | Active | |
| International Tradelink Limited Director • Building Services Engineer | 2 May 1992←33 Years→Current | Active | |
| Ventland Limited Director • Building Services Engineer | 20 Aug 1991←34 Years→Current | Active | |
| Ventplan Limited Director • Building Services Engineer | 14 Jan 1991←30 Years→1 Jan 2022 | Active | |
