| Company | Timeline | Status | |
| Isaac Butterworth Limited Director • Director | 14 Dec 2004←20 Years→Current | Active | |
| Isaac Butterworth (Ironfounders) Limited Director • Director | 1 Aug 2003←22 Years→Current | Active | |
| Quantrate Limited Director • Director | 27 Jan 2003←22 Years→Current | Active | |
| Quantrate Limited Secretary • Engineer | 26 Mar 2002←5 Years→23 Aug 2007 | Active | |
