| Company | Timeline | Status | |
| The Lorimer Society (Incorporating The Hew Lorimer Trust) Director • Building Survey | 12 Sep 2022←3 Years→Current | Active | |
| Castles Of Scotland Preservation Trust Director • None | 23 Apr 2011←3 Years→31 Mar 2015 | Dissolved | |
| The Architectural Heritage Society Of Scotland Director • Architectural Historian | 17 Mar 2009←2 Years 7 Months→29 Oct 2011 | Active | |
Vivat Trust Management Services Limited Director • Historian | 8 Nov 2007←7 Years→31 Mar 2015 | Dissolved | |
Vivat Trust Limited(The) Director • Historian | 8 Nov 2007←7 Years→31 Mar 2015 | Dissolved | |
| Sahgb Publications Limited Director • Historian | 3 Jan 2006←11 Years→2 Jun 2017 | Active | |
| Society Of Architectural Historians Of Great Britain(The) Director • Historian | 8 Sep 2005←11 Years→31 Aug 2017 | Active | |
| Historic Churches Scotland Director • Architectural Historian | 25 Jan 1996←29 Years→Current | Active | |
