| Company | Timeline | Status | |
| Spcallister Ltd Director • Director | 12 Mar 2024←1 Year 7 Months→Current | Active | |
| ABSS Group Ltd Director • Director | 24 Feb 2023←2 Years 8 Months→Current | Active | |
| ABSS Group Ltd Director • Director | 24 Feb 2023←2 Years 1 Month→5 Apr 2025 | Active | |
| Advanced Building Service Solutions Ltd Director • Electrician | 3 Jul 2020←5 Years→Current | Active | |
| Advanced Building Service Solutions Ltd Director • Electrician | 3 Jul 2020←4 Years→5 Apr 2025 | Active | |
| Steven Callister Electrical Limited Director • Manager | 23 Apr 2009←11 Years→17 Nov 2020 | Dissolved | |
