| BOYLE, James Anthony ACTIVE | Secretary | 01 Aug 2017 | | | | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| BOYLE, James Anthony ACTIVE | Director | 10 Jun 2021 | | England | May 1982 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| DISNEY, Matthew ACTIVE | Director | 16 Dec 2024 | | England | December 1971 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| HICKOX, Paul John ACTIVE | Director | 18 Jan 2026 | | England | February 1976 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| CARMICHAEL, Jeremy Robert RESIGNED | Secretary | | 04 Feb 1994 | | | 1 Tintern Road, Crawley, West Sussex, RH11 8NG |
| HULL, John Karl RESIGNED | Secretary | 31 Jan 1997 | 31 Jan 1997 | | | 155 Faversham Road, Kennington, Ashford, Kent, TN24 9AE |
| HULL, John Karl RESIGNED | Secretary | | 17 Jul 1998 | | | 155 Faversham Road, Kennington, Ashford, Kent, TN24 9AE |
| JOHN, Carolyn Margaret RESIGNED | Secretary | 30 Sep 2003 | 31 Mar 2010 | | | 44 Alpine Road, Hove, East Sussex, BN3 5HG |
| MINTER, Stephen John Penson RESIGNED | Secretary | 12 Apr 1994 | 15 Dec 1994 | | | 15 Costells Edge, Scaynes Hill, Haywards Heath, West Sussex, RH17 7PY |
| MOORES, Geoffrey Philip RESIGNED | Secretary | 29 Feb 2008 | 03 Jun 2009 | | | 23, Nymans Close, Horsham, West Sussex, RH12 5JR, United Kingdom |
| MURRAY, Stuart Cameron RESIGNED | Secretary | 03 Jun 2009 | 01 Aug 2017 | | | 36, Ring Road, Lancing, West Sussex, BN15 0QE |
| MYERS, David Keith RESIGNED | Secretary | 17 Jul 1998 | 09 Oct 2001 | | | Dale Cottage 130 Manor Way, Aldwick Bay, Bognor Regis, West Sussex, PO21 4HL |
| PLATTS, Marcus RESIGNED | Secretary | 09 Oct 2001 | 30 Sep 2003 | | | Hyde Lodge, London Road,, Handcross, West Sussex, RH17 6HD |
| SAMBROOK, Martin Robert RESIGNED | Secretary | 15 Mar 2004 | 29 Feb 2008 | | | 51 Wilbury Crescent, Hove, East Sussex, BN3 6FJ |
| SAUZIER, Joseph Robert Denis RESIGNED | Secretary | 15 Dec 1994 | 31 Jan 1997 | | | The School House, Henfield Common South, Henfield, West Sussex, BN5 9RS |
| SAUZIER, Joseph Robert Denis RESIGNED | Secretary | 04 Feb 1994 | 12 Apr 1994 | | | The School House, Henfield Common South, Henfield, West Sussex, BN5 9RS |
| ADAMS, David Leslie RESIGNED | Director | 18 May 1995 | 21 Dec 1995 | Canada | June 1956 | 317 Pinetree Crescent, Beaconsfield, Qc H9w 5e2, Canada |
| ADERHOLD, Ulrich RESIGNED | Director | 03 Jun 2009 | 01 Nov 2011 | Germany | May 1956 | 82041, Oberhaching, Hirtenweg 21 |
| ANDERSON, Nicolas Charles, Dr RESIGNED | Director | 05 May 2006 | 03 Jun 2009 | United Kingdom | May 1968 | Saxonbury, 55 Petersfield Road, Midhurst, West Sussex, GU29 9JH |
| BELL, Ian Kenneth RESIGNED | Director | 11 Oct 2011 | 16 May 2018 | England | November 1960 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| BENTLEY, David Alan RESIGNED | Director | 07 Jun 2022 | 12 Mar 2024 | England | September 1964 | Rutland House, Lincoln Road, Fulbeck, Grantham, NG32 3LG, England |
| BLACKBURN, Clive Kieren RESIGNED | Director | 05 Jul 2002 | 31 Mar 2006 | | March 1959 | 8 The Spinney, Bradley Stoke, Bristol, BS32 8ES |
| BOAKES, John Victor RESIGNED | Director | | 18 May 1995 | | February 1942 | Colgate Hill Springfield Lane, Colgate, Horsham, West Sussex, RH12 4TA |
| BREMNER, Karen Dawn RESIGNED | Director | 12 Mar 2024 | 16 Dec 2024 | United Kingdom | November 1971 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| BURNEY, Derek Hudson RESIGNED | Director | 01 Oct 1999 | 09 Oct 2001 | | November 1939 | 18a Deer Park Crescent, Toronto, Ontario, M4v 2c2, Canada |
| CALDWELL, John Edward RESIGNED | Director | 18 May 1995 | 30 Sep 1999 | | February 1950 | 71 Babcombe Drive, Thornhill L3t 1m9, Ontario Canada, FOREIGN |
| CAMPBELL, Donald RESIGNED | Director | 05 Jul 2002 | 31 Mar 2007 | | December 1940 | 73 Rideau Terrace, Ottawa, Ontario K1m 2a2, FOREIGN, Canada |
| D'ULISSE, Pietro RESIGNED | Director | 01 Nov 2011 | 22 Oct 2020 | Canada | August 1960 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| DE SERRE, Gaetan RESIGNED | Director | 22 Oct 2020 | 18 Jan 2026 | Canada | March 1962 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| GARCIA ELIPE, Jose Maria RESIGNED | Director | 17 Feb 2020 | 10 Jun 2021 | England | March 1975 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| ISON, Robert Peter RESIGNED | Director | 09 Oct 2001 | 31 Jul 2005 | England | February 1951 | 48 Staples Hill, Partridge Green, Horsham, West Sussex, RH13 8LF |
| LEFEBVRE, Stephane RESIGNED | Director | 16 Aug 2011 | 23 May 2016 | Canada | November 1967 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| MCHALE, Bryan Michael RESIGNED | Director | | 31 Oct 1993 | | February 1933 | 26 Trent Road, Goring By Sea, Worthing, West Sussex, BN12 4EL |
| MOHSIN, Hasnain RESIGNED | Director | 01 Jul 2013 | 17 Feb 2020 | England | October 1978 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| MOORES, Geoffrey Philip RESIGNED | Director | 29 Feb 2008 | 30 Jun 2013 | Great Britain | September 1969 | 23, Nymans Close, Horsham, West Sussex, RH12 5JR, United Kingdom |
| MYERS, David Keith RESIGNED | Director | 24 Apr 1998 | 09 Oct 2001 | England | July 1950 | Dale Cottage 130 Manor Way, Aldwick Bay, Bognor Regis, West Sussex, PO21 4HL |
| NAISMITH, Andrew RESIGNED | Director | 16 May 2018 | 07 Jun 2022 | England | July 1962 | Innovation Drive, Burgess Hill, West Sussex, RH15 9TW |
| NEWTON, Peter John RESIGNED | Director | 28 Sep 1995 | 27 Jun 2002 | | May 1949 | 18 Cedars Gardens, Withdean, Brighton, East Sussex, BN1 6YD |
| PARENT, Marc RESIGNED | Director | 31 Mar 2007 | 11 Oct 2011 | Canada | February 1961 | 39 De L'Alcazar Street, Blainville, Quebec, J7b 1r4, Canada |
| PREST, Nicholas Martin RESIGNED | Director | 22 Sep 1993 | 18 May 1995 | Great Britain | April 1953 | 85 Elgin Crescent, London, W11 2JF |
| RAQUEPAS, Alain RESIGNED | Director | 05 Jul 2002 | 26 May 2011 | Canada | April 1966 | 435 Rutledge Street, St Lambert, Quebec J4r 1l4, J4R 1L43, Canada |
| RENAUD, Paul Gary RESIGNED | Director | 18 May 1995 | 29 Oct 2004 | Canada | July 1954 | 3355 Sawmill Valley Drive, Mississauga, Ontario L5l 2z8 Canada |
| SAMBROOK, Martin Robert RESIGNED | Director | 15 Mar 2004 | 29 Feb 2008 | | August 1952 | 51 Wilbury Crescent, Hove, East Sussex, BN3 6FJ |
| SAUZIER, Joseph Robert Denis RESIGNED | Director | 22 Sep 1993 | 24 Apr 1998 | | August 1943 | The School House, Henfield Common South, Henfield, West Sussex, BN5 9RS |
| WHITE, Brian Noble RESIGNED | Director | | 30 Apr 1946 | | April 1946 | Westwinds Hoo Lane, Chipping Campden, Gloucestershire, GL55 6AZ |