| Company | Timeline | Status | |
| The Architectural History Practice Limited Director • Architectural Historian  | 26 Jan 1999←8 Years→31 Dec 2007  | Active  | |
| The Architectural History Practice Limited Secretary • Architectural Historian  | 26 Jan 1999←8 Years→31 Dec 2007  | Active  | |
| Society Of Architectural Historians Of Great Britain(The) Director • Chartered Accountant  | 7 Nov 1994←3 Years→3 Sep 1998  | Active  | |
