| Company | Timeline | Status | |
| Irvine & Black Investments Limited Director • Director | 25 Mar 2024←1 Year 7 Months→Current | Active | |
| Irvine Civil Engineering Ltd Director • Director | 1 Dec 2023←1 Year 11 Months→Current | Active | |
| Ice Company Holdings Ltd Director • Construction Director | 16 Mar 2022←3 Years→Current | Active | |
| JMB Plant Limited Director • Construction Director | 6 Mar 2018←6 Years→13 Aug 2024 | Dissolved | |
JMB Maintenance (Glasgow) Limited Director • Buider | 4 Nov 2009←6 Years→6 Sep 2016 | Dissolved | |
