| ALLAN, Paul ACTIVE | Director | 31 Mar 2022 | | England | January 1971 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| LINDMARK, Liza Charlotte ACTIVE | Director | 21 Jun 2024 | | England | June 1982 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| MIRAMONTES FRAGA, Jose Luis ACTIVE | Director | 06 Mar 2020 | | England | September 1969 | Honeywell House, Skimped Hill Lane, Bracknell, RG12 1EB, England |
| OBOMIGHIE, Abieyuwa Agnes ACTIVE | Director | 11 Jun 2026 | | England | April 1976 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| BERGENDORF, Harold William, Assistant Secretary RESIGNED | Secretary | 01 Jan 1993 | 23 Jul 1997 | | | 305 Linden Road North, Prospect Heights, Illinois 60070, FOREIGN, Usa |
| BEVAN, Richard Edward RESIGNED | Secretary | 21 Jan 2000 | 28 Jun 2005 | | | 3 Northdowns, Cranleigh, Surrey, GU6 8BY |
| CHISHOLM, Iain Macdonald RESIGNED | Secretary | | 15 Jan 1993 | | | 43 Wroxham Gardens, Potters Bar, Hertfordshire, EN6 3DJ |
| DAIL, Gurmit Singh RESIGNED | Secretary | 28 Jun 2005 | 21 Sep 2007 | | | Chazey House, 64 Chazey Road, Caversham, Reading, Berkshire, RG4 7DU |
| HAUSCH, Ronald Herman, Secretary RESIGNED | Secretary | 01 Jan 1993 | 21 Jan 2000 | | | Dove Cottage No 9 The Courtyard, Forest Grange, Horsham, West Sussex, RH13 6HX |
| LOFTUS, Brian A, Assistant Secretary RESIGNED | Secretary | 23 Jul 1997 | 30 Sep 2000 | | | 925 Summit Drive Deerfield 60015, Illinois, United States Of America, FOREIGN |
| PATEL, Bhasmita Kumari RESIGNED | Secretary | 21 Sep 2007 | 01 Jan 2009 | | | 29 Ashley Drive, Walton On Thames, Surrey, KT12 1JT |
| PATEL, Bhasmita Kumari RESIGNED | Secretary | 01 Jan 1993 | 30 Sep 1999 | | | 9 Northcliffe Close, Worcester Park, Surrey, KT4 7DS |
| VAN DE KERCKHOVE, Michael RESIGNED | Secretary | 23 Jul 1997 | 30 Apr 2007 | | | 16 Friar Tuck Court Lincolnshire, 60069 Illinois, United States Of America |
| SISEC LIMITED RESIGNED | Secretary | 01 Jan 2009 | 29 Jan 2016 | | | 21, Holborn Viaduct, London, EC1A 2DY, United Kingdom |
| ARNESON, Allen David RESIGNED | Director | 29 Jul 2003 | 01 Apr 2004 | | June 1950 | 121 West Constance Lane, Countryside, Illinois 60525, Usa |
| BEATTIE, Alec Norman RESIGNED | Director | 01 Jan 1993 | 31 Jul 2001 | | December 1941 | 29 Hacketts Lane, Pyrford, Woking, Surrey, GU22 8PP |
| BELLAMY, Jonathan Gordon Paul RESIGNED | Director | 06 Jul 2010 | 10 Aug 2015 | United States | August 1965 | 25, East Algonquin Road, Des Plaines, Illinois, 60017, Usa |
| BLANE, Kenneth Charles RESIGNED | Director | | 31 Mar 1997 | United Kingdom | July 1935 | 5 Brinsmade Road, Ampthill, Bedford, Bedfordshire, MK45 2PP |
| BROWN, David RESIGNED | Director | 01 Jan 1993 | 30 Sep 2002 | | March 1944 | Round Oak Cottage, Blackhorse Road Crastock, Woking, Surrey, GU22 0QT |
| BROWN, Helen Barbara Anne RESIGNED | Director | 29 Jul 2003 | 30 Sep 2009 | | December 1951 | 16 East Sheen Avenue, London, SW14 8AS |
| CHISHOLM, Iain Macdonald RESIGNED | Director | | 10 Apr 2001 | England | March 1950 | 16 Anthorne Close, Potters Bar, Hertfordshire, EN6 1RW |
| COOPER, Geoffrey Michael James RESIGNED | Director | | 23 Jul 1997 | | October 1950 | 250 Ambria Drive, Mundelin, Illinois 60060, Usa |
| DACEY, Lee RESIGNED | Director | 29 Jul 2003 | 13 Jun 2005 | United Kingdom | November 1962 | River Lodge, River Road, Arundel, West Sussex, BN18 9EY |
| DAVIES, Glen William RESIGNED | Director | 13 Aug 2001 | 28 Apr 2023 | United Kingdom | May 1956 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| DEARNLEY, Simon Christopher RESIGNED | Director | 28 Apr 2023 | 25 Jun 2026 | England | March 1964 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| DONALD, Graeme Hugh Hamilton RESIGNED | Director | 26 Oct 2001 | 29 Jul 2003 | | September 1946 | 225 Deer Keep, Richmond, Virginia 23233, IRISH, Usa |
| DURDEVIC, Aleksandar Dusan RESIGNED | Director | 19 Jan 2001 | 29 Jul 2003 | | October 1942 | 2 Foxhill Mews, Longcross Road, Ottershaw, Surrey, KT16 0AH |
| FLANAGAN, Sarah Louise RESIGNED | Director | 01 Jan 2006 | 18 Jan 2008 | | September 1971 | 448 North Walnut Street, Elmhurst, Illinois, 60126, Usa |
| GALLAGHER III, John Joseph RESIGNED | Director | 02 Oct 2000 | 18 May 2001 | | March 1964 | 714 Thurlow Street, Hinsdale, Illinois, 60521, Usa |
| GENIS, Orhan RESIGNED | Director | 15 Nov 2001 | 18 Feb 2008 | England | April 1952 | 47 Old Palace Road, Guildford, Surrey, GU2 7TX |
| GILSDORF, Norman Lee RESIGNED | Director | 21 Jan 2000 | 30 Sep 2000 | | December 1953 | 8 White House Drive, Guildford, Surrey, GU1 2SU |
| GLEDHILL, David Allen RESIGNED | Director | 10 Aug 2017 | 02 Nov 2023 | United Kingdom | December 1965 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| HAGGER, Antony James RESIGNED | Director | 31 Aug 2019 | 18 Aug 2023 | United Kingdom | August 1957 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| HEATH, Dominic Xavier Pulin RESIGNED | Director | 30 Sep 2009 | 01 Dec 2014 | United Kingdom | July 1962 | Liongate, Ladymead, Guildford, Surrey, GU1 1AT |
| JAMES, George RESIGNED | Director | 02 Nov 2023 | 15 May 2026 | England | April 1990 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| JELASI, Rocco RESIGNED | Director | 23 Jul 1997 | 29 Jul 2003 | | January 1941 | Via A Volta Monza 6 - 20052 Milan, Italy |
| LABANOSKY, James Alan RESIGNED | Director | 27 Jul 2004 | 26 Jan 2005 | | September 1947 | 302 Crosscreek Drive, Bossier City, Louisiana 71111, Usa |
| LAWRENCE, Herbert Gordon, Director RESIGNED | Director | | 30 Sep 1999 | | May 1939 | 410 Westwood Drive, Barrington, Illinois 60010, Usa |
| MCKEE, Glenn Louis RESIGNED | Director | 28 Jul 1995 | 23 Jul 1997 | | March 1943 | 23143 North Providence Drive, Kildeer Illinois 60047, Usa, FOREIGN |
| MEURLING, Peter Jan Henrik RESIGNED | Director | 01 Jan 1993 | 21 Jan 2000 | | September 1941 | Merry Lodge, Hazel Road, West Byfleet, Surrey, KT14 6JJ |
| MILLARD, Michael Tal RESIGNED | Director | 01 Jun 2016 | 10 Aug 2017 | United States | May 1955 | Uop Llc, 25 East Algonquin Road, Des Plaines, Illinois, 60016, Usa |
| ORCHARD, Nigel John Davison RESIGNED | Director | 21 Jan 2000 | 31 Mar 2020 | United Kingdom | February 1954 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| PIERCE, Tina Kay RESIGNED | Director | 18 Jan 2008 | 19 Aug 2013 | Usa | November 1966 | 25, East Algonquin Road, Des Plaines, Illinois, 60017, Usa |
| PIOTROWSKI, Peter Paul RESIGNED | Director | 29 Jul 2003 | 01 Jun 2016 | Usa | February 1953 | 25, East Algonquin Road, Des Plaines, Illinois 60017, Usa |
| PITKIN, John RESIGNED | Director | 30 Sep 2009 | 31 Aug 2019 | | September 1951 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| PITTAS, John Francis RESIGNED | Director | | 01 Feb 1992 | | June 1932 | 1131 North Derbyshire, Arlington Heights, Illinois, FOREIGN, Usa |
| PRESTON, Michael RESIGNED | Director | 19 Aug 2013 | 25 Jul 2016 | United States | July 1971 | Uop Llc, 25 E. Algonquin Road, Des Plaines, Illinois, 60017-5017, Usa |
| SCHNEIDER, Otto-John RESIGNED | Director | 12 Jul 1993 | 23 Jul 1997 | | September 1947 | The Laurels Pewley Point Pewley Hill, Guildford, Surrey, GU1 3SP |
| SHEARS, Thomas Henry RESIGNED | Director | 01 Apr 2004 | 31 Dec 2005 | | April 1958 | 512 Wanetah Drive, Midland 48640, Michigan, Usa |
| SHEARS, Thomas Henry RESIGNED | Director | 01 Jan 2002 | 29 Jul 2003 | | April 1958 | 512 Wanetah Drive, Midland 48640, Michigan, Usa |
| SHECKLER, John Charles RESIGNED | Director | 01 Apr 2022 | 21 Jun 2024 | England | June 1959 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |
| SLIETER, Kelly Jean RESIGNED | Director | 10 Aug 2015 | 01 Nov 2018 | United States | June 1974 | 25, East Algonquin Road, Des Plaines, Illinois, 60016, United States |
| SMITH, Rodney Arthur RESIGNED | Director | 29 Jul 2003 | 14 Aug 2006 | | May 1957 | 25548 Broken Bow Pass, Barrington, Illinois 60010, Usa |
| TUROWICZ, Marek Stefan Karol RESIGNED | Director | 01 Dec 2014 | 07 Nov 2016 | United Kingdom | February 1955 | Liongate, Ladymead, Guildford, Surrey, GU1 1AT |
| VAINIERI, Humberto RESIGNED | Director | 02 Oct 2000 | 26 Oct 2001 | | May 1948 | 10 South Wynstone Drive, Barrington, Illinois, 60010, Usa |
| VAUSE, Elizabeth Skinner RESIGNED | Director | 30 Sep 2009 | 06 Jul 2010 | | August 1968 | 15009, Carter Street, Overland Park, Ks, 66221, United States |
| WALKER JR., Gordon Davies RESIGNED | Director | 25 Jul 2016 | 07 Oct 2019 | United States | December 1975 | 25, East Algonquin Road, Des Plaines, Illinois, 60016, United States |
| WARD, Henderson Crawford Jr RESIGNED | Director | 01 Jan 1993 | 12 Jul 1993 | | August 1947 | 5 Meadway Gate, London, NW11 7LA |
| WINFIELD, Michael David RESIGNED | Director | 01 Jan 1993 | 19 Jan 2001 | | February 1939 | 6317 R F D, Long Grove, Illinois 60047, Usa |
| WOODCOCK, John Grantly RESIGNED | Director | 02 Jan 2007 | 31 Mar 2022 | United Kingdom | November 1956 | Honeywell House, Skimped Hill Lane, Bracknell, Berks, RG12 1EB, England |