| Company | Timeline | Status | |
| Safeair Purifier Limited Director • Director | 9 Aug 2017←5 Years→4 Oct 2022 | Active | |
| TQ Marine Limited Director • Company Director | 31 Aug 2012←10 Years→4 Oct 2022 | Active | |
| TQ Sensors Limited Director • Company Director | 31 Aug 2012←10 Years→4 Oct 2022 | Active | |
Austech Instruments (Europe) Limited Director • Company Director | 8 Jun 2012←5 Years→8 May 2018 | Dissolved | |
| TQ Environmental Limited Director • Director | 11 Apr 2008←14 Years→4 Oct 2022 | Active | |
| TQ Limited Director • Administrator | 30 Jul 2003←19 Years→4 Oct 2022 | Active | |
| TQ Environmental Limited Director • Director | 4 Jul 1992←1 Year 4 Months→16 Nov 1993 | Active | |
| TQ Environmental Limited Secretary • Unreported | 4 Jul 1992←4 Years→15 Jan 1997 | Active | |
Austech Instruments (Europe) Limited Director • Housewife | 1 Apr 1992←8 Years→25 Jul 2000 | Dissolved | |
Austech Instruments (Europe) Limited Secretary • Housewife | 1 Apr 1992←8 Years→25 Jul 2000 | Dissolved | |
