| Company | Timeline | Status | |
| Topcon Construction Holdings Limited Director • Teacher | 11 Nov 2015←9 Years→Current | Active | |
| Topcon Construction Limited Director • Teacher | 11 Nov 2015←9 Years→Current | Active | |
| Topcon Building Limited Director • Teacher | 11 Nov 2015←5 Years→29 Dec 2020 | Active | |
