| Company | Timeline | Status | |
| Sigma Mechanical Contracts Limited Director • Unreported | 14 Nov 2023←2 Years→Current | Active | |
| Sigma Electrical Contracts (N.E) Limited Director • Unreported | 7 Jun 2016←9 Years→Current | Active | |
Sigma Electrical Contracts Limited Director • Electrical Contractor | 21 Jun 2007←11 Years→9 May 2019 | Dissolved | |
