| Company | Timeline | Status | |
| Cushion Craft Limited Director • Director | 17 Oct 2011←10 Years→2 Aug 2022 | Dissolved | |
| LK Assure Limited Director • Accountant | 8 Dec 2008←2 Years 6 Months→4 Jul 2011 | Active | |
| LK Consult Limited Director • Accountant | 8 Dec 2008←2 Years 6 Months→4 Jul 2011 | Active | |
| LK Energy Solutions Limited Director • Accountant | 8 Dec 2008←2 Years 6 Months→4 Jul 2011 | Active | |
| Irish Diaspora Foundation Director • Accountant | 28 Aug 2008←4 Years→30 Dec 2012 | Active | |
| LK Remediate Limited Director • Accountant | 8 Mar 2007←4 Years→4 Jul 2011 | Active | |
| LK Management Limited Director • Accountant | 28 Feb 2007←4 Years→4 Jul 2011 | Active | |
| LK Pollution Response Limited Director • Accountant | 1 Oct 2006←4 Years→4 Jul 2011 | Active | |
| Leyden Kirby Associates Limited Director • Accountant | 1 Oct 2006←4 Years→4 Jul 2011 | Active | |
| Air Testing UK Ltd Director • Accountant | 24 Apr 2006←1 Year 5 Months→19 Oct 2007 | Active | |
