| DALE, Thomas Andrew ACTIVE | Secretary | 19 Mar 2020 | | | | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| DALE, Thomas Andrew ACTIVE | Director | 26 Mar 2025 | | England | April 1986 | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| MEIER, Jutta ACTIVE | Director | 22 Jan 2024 | | United States | May 1966 | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| COVENTRY, James Leslie RESIGNED | Secretary | 22 Nov 2000 | 16 Jan 2009 | | | 85 Priory Oak, Bridgend, Mid Glamorgan, CF31 2HZ |
| HOWELLS, Jason Mark RESIGNED | Secretary | 11 Apr 2018 | 20 Dec 2019 | | | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| MCLEAN, Ian Donald RESIGNED | Secretary | | 30 Aug 1994 | | | 54 Battledean Road, Highbury, London, N5 1UZ |
| RASMUSSEN, Phillip John RESIGNED | Secretary | 19 Jan 2009 | 01 Apr 2018 | | | Lagreach, Botany Bay, Monmouthshire, NP16 6NJ, Uk |
| SECCULL, Brian Richard RESIGNED | Secretary | 30 Aug 1994 | 22 Nov 2000 | | | 12 Maple Close, Brackley, Northamptonshire, NN13 6EX |
| AINSWORTH, Godfrey Howard Harrison, Dr RESIGNED | Director | 24 Sep 2018 | 25 Jun 2019 | England | June 1955 | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| BYARS, Stephen RESIGNED | Director | 22 Nov 2000 | 07 Mar 2003 | | March 1958 | The Spinney 126 Cyncoed Road, Cyncoed, Cardiff, CF2 6BN |
| CADELL, Ian Victor RESIGNED | Director | | 30 Aug 1994 | England | July 1940 | Nobbscrook Farm, Drift Road Winkfield, Windsor, Berkshire, SL4 4RR |
| FURLONG, Mark Justin, Dr RESIGNED | Director | 01 May 2003 | 09 Feb 2023 | England | February 1971 | Wafer Technology Limited, Maryland Road, Tongwell, Milton Keynes, MK15 8HJ, England |
| GRANT, Ian Richard, Dr RESIGNED | Director | 30 Aug 1994 | 31 May 2005 | | September 1953 | 48 London Road, Godmanchester, Huntingdon, Cambridgeshire, PE18 8JA |
| JOHNSON, Andrew David, Dr RESIGNED | Director | 01 Jun 2005 | 05 Jul 2012 | United Kingdom | September 1963 | 27 Priory Way, Langstone, Newport, NP18 2JE |
| LAMB, Karen Elaine RESIGNED | Director | 30 Aug 1994 | 07 Mar 2003 | | October 1963 | 16 East Chapel, Tattenhoe, Milton Keynes, Buckinghamshire, MK4 3AR |
| LAMB, Martin Steven Mark RESIGNED | Director | 30 Aug 1994 | 29 Apr 2005 | | May 1960 | 16 East Chapel, Tattenhoe, Milton Keynes, Buckinghamshire, MK4 3AR |
| LEMOS, Americo RESIGNED | Director | 10 Jan 2022 | 28 Oct 2024 | United States | July 1967 | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| NEEDHAM, James Garland RESIGNED | Director | | 30 Aug 1994 | | November 1930 | Steinhurst Church Lane, Little Billing, Northampton, Northamptonshire, NN3 9AF |
| NELSON, Andrew William, Dr RESIGNED | Director | 22 Nov 2000 | 10 Jan 2022 | Wales | January 1955 | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| PULLEN, Timothy Neil RESIGNED | Director | 28 Mar 2019 | 07 Jun 2023 | England | November 1977 | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| RUMMINGS, Neil John RESIGNED | Director | 07 Jun 2023 | 23 Jan 2024 | Wales | May 1975 | Pascal Close, St Mellons, Cardiff, South Glamorgan, CF3 0LW |
| SECCULL, Brian Richard RESIGNED | Director | 30 Aug 1994 | 02 Jan 2001 | | October 1935 | 12 Maple Close, Brackley, Northamptonshire, NN13 6EX |