| Company | Timeline | Status | |
| Koller Engineering (Holdings) Limited Director • Director | 23 Nov 2017←5 Years→21 Aug 2023 | Active | |
| Koller Engineering Limited Director • Director | 14 Feb 1993←30 Years→21 Aug 2023 | Active | |
| Koller Engineering Limited Secretary • Unreported | 14 Feb 1993←30 Years→21 Aug 2023 | Active | |
