| Company | Timeline | Status | |
| Thomas Armstrong (Holdings) Limited Director • Director | 11 Dec 1995←16 Years→30 Sep 2012 | Active | |
| Thomas Armstrong (Aggregates) Limited Director • Company Director | 14 Mar 1991←9 Years→6 Jun 2000 | Active | |
| Thomas Armstrong (Construction) Limited Director • Managing Director | 14 Mar 1991←9 Years→9 Jun 2000 | Active | |
