| Company | Timeline | Status | |
| Verity Private Investigations Limited Director • Company Director | 20 Nov 2014←1 Year 7 Months→28 Jun 2016 | Dissolved | |
| Blackburns DMS Limited Director • Director | 11 Feb 2009←5 Years→3 Jun 2014 | Dissolved | |
| John Blackburn Limited Director • Joint Managing Director | 12 Feb 2001←9 Years→18 Nov 2010 | Active | |
