| Company | Timeline | Status | |
| Flat Roofing Systems (Greater London) Ltd Director • Director  | 29 May 2020←2 Years 5 Months→1 Nov 2022  | Dissolved  | |
| Simon Miller Interiors Ltd Director • Director  | 11 Mar 2014←10 Years→3 Sep 2024  | Dissolved  | |
| Simon Miller Architects Ltd Director • Architect  | 14 Mar 2005←20 Years→Current  | Active  | |
