| Company | Timeline | Status | |
| D.P. Cold Planing (Holdings) Limited Secretary • Secretary | 19 May 2006←2 Years 10 Months→8 Apr 2009 | Active | |
| D.P. Cold Planing (Holdings) Limited Director • Secretary | 19 May 2006←1 Year 8 Months→5 Feb 2008 | Active | |
| D.P. Cold Planing Limited Director • Secretary | 25 Oct 1991←16 Years→5 Feb 2008 | Active | |
| D.P. Cold Planing Limited Secretary • Secretary | 25 Oct 1991←17 Years→8 Apr 2009 | Active | |
