| Company | Timeline | Status | |
| Terrapens Limited Director • Civil Engineer | 31 Jan 2023←2 Years 9 Months→Current | Active | |
| WTB Beauty Limited Director • Unreported | 9 Dec 2019←5 Years→Current | Active | |
| Rocklyn Engineering Limited Director • Unreported | 5 Dec 2019←5 Years→Current | Active | |
| Ipark Glasgow Ltd Director • Civil Engineer | 18 Sep 2019←6 Years→Current | Active | |
| Sarcon (No. 375) Limited Director • Company Director | 28 Apr 2017←8 Years→Current | Liquidation | |
| McLaughlin & Harvey Holdings Limited Director • Managing Director | 1 Oct 2015←10 Years→Current | Active | |
| Barr Subco 2 Limited Director • Director | 12 Nov 2014←10 Years→Current | Active | |
| Barr Cairnryan Limited Director • Civil Engineer | 3 Sep 2008←17 Years→Current | Active | |
Barr Investments Limited Director • Civil Engineer | 24 May 2007←10 Years→27 Mar 2018 | Dissolved | |
Barr Construction Support Limited Director • Civil Engineer | 24 May 2007←10 Years→3 Apr 2018 | Dissolved | |
