| Company | Timeline | Status | |
| Irish Naturalists' Journal Limited -The Director • University Lecturer | 10 Sep 2008←1 Year→1 Oct 2009 | Active | |
| Dalriada School Director • University Reader | 27 Feb 1998←14 Years→31 Aug 2012 | Active | |
| Irish Naturalists' Journal Limited -The Director • University Reader | 22 Jan 1997←7 Years→1 Jan 2005 | Active | |
| Irish Naturalists' Journal Limited -The Director • Senior University Lecturer | 30 Dec 1992←10 Years→8 May 2003 | Active | |
