| Company | Timeline | Status | |
| Shafer International Limited Director • Air Tester | 15 Jul 2014←8 Years→30 Aug 2022 | Dissolved | |
| Air Testing Limited Director • Director | 8 Feb 2008←17 Years→Current | Active | |
| Air Testing Limited Secretary • Unreported | 8 Feb 2008←17 Years→Current | Active | |
