| Company | Timeline | Status | |
| R.H. Irving Construction Limited Secretary • Unreported | 23 Jan 2004←13 Years→22 Nov 2017 | Active | |
| Rhi Industrials Limited Director • Engineer | 6 Feb 2002←21 Years→2 May 2023 | Active | |
| R.H. Irving Construction Limited Director • Civil Engineer | 1 Mar 1994←31 Years→Current | Active | |
