| Company | Timeline | Status | |
| 38-44 Dochdwy Road Management Co. Ltd Director • Structural Engineer | 6 Nov 2006←13 Years→27 Feb 2020 | Active | |
| P.M.B. & S.C. Limited Director • Structural Engineer | 1 Mar 1994←6 Years→13 Aug 2000 | Active | |
| Walter Grenville & Co Limited Director • Unreported | 4 Apr 1991←4 Years→8 Mar 1996 | Liquidation | |
| Walter Grenville & Co Limited Secretary • Unreported | 4 Apr 1991←4 Years→8 Mar 1996 | Liquidation | |
