| Company | Timeline | Status | |
| WP Safety-Kleen (Cayman) Limited Director • None | 16 Aug 2011←3 Years→2 Apr 2015 | Active | |
| WP Safety-Kleen Limited Director • None | 16 Aug 2011←3 Years→2 Apr 2015 | Active | |
| S&P Trucost Limited Director • Director | 16 Jun 2011←4 Years→22 Sep 2015 | Active | |
| WP Safety-Kleen Limited Director • Director | 28 Aug 2008←8 Months→1 May 2009 | Active | |
| The American School In London Foundation (UK) Limited Director • Chairman | 14 May 2008←2 Years 8 Months→17 Jan 2011 | Active | |
| American School In London Educational Trust Limited(The) Director • Chairman | 21 Mar 2007←6 Years→30 Jun 2013 | Active | |
| WP SK France Limited Director • Director | 8 Jul 2004←9 Months→21 Apr 2005 | Dissolved | |
| WP SK Limited Director • Unreported | 8 Jul 2004←9 Months→21 Apr 2005 | Active | |
| WP SK Holdings Limited Director • Director | 8 Jul 2004←3 Years→2 Jul 2008 | Active | |
| Safety-Kleen Europe Limited Secretary • Unreported | 5 Jun 2000←7 Months→18 Jan 2001 | Active | |
