| CANNON, Theresa Bernadette ACTIVE | Secretary | 31 Jan 2011 | | | | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| JANSEN-STORBACKA, Johan Henrik ACTIVE | Director | 27 Oct 2025 | | Netherlands | August 1977 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| MOELKER, Adriaan Jacobus Francois ACTIVE | Director | 19 Mar 2020 | | Germany | December 1964 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| SCHNEIDERS, Michael Matthias ACTIVE | Director | 18 Apr 2023 | | Germany | November 1970 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| HOWELL, Owain Morgan Rhys RESIGNED | Secretary | 03 Jun 1995 | 24 Dec 2010 | | | Cae Gwyn, Bro Waldo, Clynderwen, Dyfed, SA66 7NQ |
| WEST, Stuart Ian RESIGNED | Secretary | | 05 Jul 1995 | | | 137 Mallards Reach, Marshfield, Cardiff, South Glamorgan, CF3 2NL |
| BARRY, Stephen Jeffrey RESIGNED | Director | 18 Feb 2010 | 16 Jul 2011 | England | April 1943 | 95, Flood Street, London, SW3 5TB, England |
| BRYCE, Daren John Frazer RESIGNED | Director | 12 Apr 2017 | 05 Mar 2024 | Wales | March 1974 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| DANIELS, Michael RESIGNED | Director | | 27 Apr 1984 | | July 1937 | Park Cottage Sandford Lane, Hurst, Reading, Berkshire, RG10 0SU |
| DOWD, David Allen RESIGNED | Director | 28 Nov 1994 | 30 May 1995 | | March 1938 | Netherdene Haverbreaks Road, Lancaster, Lancashire, LA1 5BJ |
| DOWD, David Allen RESIGNED | Director | | 30 Jun 1984 | | March 1938 | Netherdene Haverbreaks Road, Lancaster, Lancashire, LA1 5BJ |
| DOWSETT, Leonard Robert RESIGNED | Director | | 30 May 1995 | | July 1923 | 7 Kerdistone Close, Potters Bar, Hertfordshire, EN6 1LG |
| ECK, Jürgen, Dr RESIGNED | Director | 17 Mar 2018 | 19 Mar 2020 | Germany | August 1962 | B.R.A.I.N. Ag, Darmstädter Strasse 34-36, 64673 Zwingenberg, Germany |
| ELLIS, Andrew James, Dr RESIGNED | Director | 01 Apr 2013 | 11 Mar 2024 | United Kingdom | April 1977 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| GODFREY, Anthony RESIGNED | Director | | 05 Jul 1995 | | June 1939 | Glenview Common Road, Gilwern, Abergavenny, Gwent, NP7 0DR |
| GOEBEL, Frank RESIGNED | Director | 17 Mar 2018 | 31 Dec 2018 | Germany | October 1969 | B.R.A.I.N. Ag, Darmstädter Strasse 34-36, 64673 Zwingenberg, Germany |
| HOWELL, Owain Morgan Rhys RESIGNED | Director | 03 Jun 1995 | 17 Jan 2017 | United Kingdom | May 1931 | Cae Gwyn, Bro Waldo, Clynderwen, Dyfed, SA66 7NQ |
| KIDSON, Robert John RESIGNED | Director | 12 Mar 2015 | 31 Dec 2016 | England | May 1956 | Biocatalysts Ltd, Cefn Coed, Nantgarw, Cardiff, CF15 7QQ, Wales |
| LINNIG, Lukas RESIGNED | Director | 24 Jun 2020 | 16 Nov 2022 | Germany | December 1993 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| PENNY, Katy Rae RESIGNED | Director | 24 Jun 2020 | 08 Mar 2024 | Wales | February 1987 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| PHILLIPS, Craig Stephen RESIGNED | Director | 18 Apr 2018 | 30 Sep 2019 | Wales | May 1982 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| ROEDDER, Ludger RESIGNED | Director | 16 Apr 2019 | 24 Jun 2020 | Germany | April 1965 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| SALISBURY, William George RESIGNED | Director | 03 Jun 1995 | 20 Jun 2007 | | June 1924 | Holy Lodge, Holymoor Road, Holymoorside, Chesterfield, Derbyshire, S42 7DS |
| SEARS-BLACK, Roderick Clive RESIGNED | Director | 18 Apr 2018 | 31 Dec 2024 | England | March 1960 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| SHARP, Emma Louise RESIGNED | Director | 19 Jun 2017 | 01 Mar 2019 | England | September 1958 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| VOLLMER, Martin RESIGNED | Director | 08 Jan 2021 | 13 Sep 2022 | Germany | April 1967 | Cefn Coed, Parc Nantgarw, Cardiff, CF15 7QQ |
| WERNICKE, Hans-Jurgen RESIGNED | Director | 23 Mar 1998 | 19 Apr 2023 | Germany | June 1949 | Kardinal Wendel Strasse 75a, Wolfratshausen, 82515, Germany |
| WEST, Stuart Ian RESIGNED | Director | | 19 Apr 2023 | Wales | July 1953 | Westfield House, Wellfield Lane, Marshfield, Cardiff, CF3 2UB |