| Company | Timeline | Status | |
| Hartman Engineering (Holdings) Limited Director • Engineer  | 13 Nov 2007←17 Years→Current  | Active  | |
| Hartman Engineering (Properties) LLP Designated LLP Member • Unreported  | 12 Nov 2007←17 Years→Current  | Active  | |
| Hartman Engineering Limited Director • Engineer  | 14 Mar 2000←25 Years→Current  | Active  | |
