| Company | Timeline | Status | |
| The Clowns' Gallery Limited Director • Research Officer | 21 May 1997←7 Years→31 Jan 2005 | Active | |
| The Technical Theatre Preservation Group Limited Director • Research Officer | 24 Apr 1991←19 Years→18 Mar 2011 | Active | |
| The Technical Theatre Preservation Group Limited Director • Unreported | 1 Jan 1970←41 Years→18 Mar 2011 | Active | |
