| HUSSEIN, Zaheed ACTIVE | Secretary | 08 Nov 2024 | | | | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| ALLEN, Toni Claire ACTIVE | Director | 21 Mar 2024 | | England | October 1977 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| CLEEVELY, David Douglas ACTIVE | Director | 01 Oct 2026 | | United Kingdom | September 1953 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| HOBBS, Graeme Nigel ACTIVE | Director | 01 Oct 2026 | | United Kingdom | May 1956 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| NEEDHAM, Paul Michael, Professor ACTIVE | Director | 01 Oct 2026 | | United Kingdom | June 1969 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| WATTS, Alan James ACTIVE | Director | 28 Feb 2022 | | Northern Ireland | August 1956 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| WYLIE, Benjamin Guy ACTIVE | Director | 30 Jun 2025 | | United Kingdom | July 1985 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| RIDING, Stephen RESIGNED | Secretary | 12 Jun 1998 | 21 Aug 1998 | | | 4 Wymondley Close, Hitchin, Hertfordshire, SG4 9PW |
| WHITE, Brian Richard RESIGNED | Secretary | 21 Aug 1998 | 24 Feb 2003 | | | 4 Collenswood Road, Stevenage, Hertfordshire, SG2 9ER |
| WILSON, Andrew Fraser RESIGNED | Secretary | 24 Feb 2003 | 08 Nov 2024 | | | 9 Howard Road, Coulsdon, Surrey, CR5 2EB |
| SWIFT INCORPORATIONS LIMITED RESIGNED | Nominee Secretary | 19 May 1998 | 12 Jun 1998 | | | 26, Church Street, London, NW8 8EP |
| AKINOLA, Yewande Modupe RESIGNED | Director | 01 Oct 2023 | 30 Sep 2026 | England | July 1984 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| ALMOND, Edward Lawrence RESIGNED | Director | 03 Nov 2006 | 17 Aug 2022 | United Kingdom | May 1964 | Kwetu, Maiden Street Weston, Hitchin, Hertfordshire, SG4 7AA |
| ARTHUR, Colin Michael, Dr RESIGNED | Director | 01 Oct 2018 | 30 Sep 2021 | United Kingdom | August 1980 | Savoy Place, London, WC2R 0BL |
| BHANGU, Bikramjit Singh, Dr RESIGNED | Director | 01 Oct 2020 | 30 Sep 2023 | Singapore | February 1976 | C/O A F Wilson, I E T Governance Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| BUNYAN, David Keith RESIGNED | Director | 05 Sep 2022 | 30 Sep 2023 | England | November 1958 | C/O A F Wilson, I E T Governance Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| BURGIN, Stephen Rex RESIGNED | Director | 05 Dec 2011 | 30 Sep 2014 | United Kingdom | September 1957 | Savoy Place, London, WC2R 0BL |
| CHERRY, Richard Jonathan RESIGNED | Director | 08 Mar 2005 | 18 Jun 2007 | United Kingdom | November 1952 | Nithsdale, 47 Junction Road, Burgess Hill, West Sussex, RH15 0JB |
| CLIMER, Naomi Wendy RESIGNED | Director | 01 Oct 2014 | 31 Oct 2017 | England | December 1964 | Savoy Place, London, WC2R 0BL |
| CONSIDINE, Vincent, Dr RESIGNED | Director | 01 Aug 2003 | 11 Oct 2004 | United Kingdom | January 1957 | Old Well House, Chapel Fields, Swinford, Leicestershire, LE17 6BS |
| DAVIDSON, Colin William RESIGNED | Director | 30 Nov 1999 | 31 Dec 2001 | | September 1934 | 20 East Barnton Avenue, Edinburgh, Midlothian, EH4 6AQ |
| FINE, Nigel RESIGNED | Director | 06 Nov 2009 | 04 Nov 2021 | England | June 1957 | Savoy Place, London, WC2R 0BL |
| GASKELL, Colin Simister RESIGNED | Director | 21 Aug 1998 | 30 Sep 2014 | United Kingdom | May 1937 | Sequoia Lodge, Oakhurst Avenue, Harpenden, Hertfordshire, AL5 2ND |
| GRANT, Giles Justus RESIGNED | Director | 03 Sep 2018 | 16 Feb 2024 | England | May 1963 | C/O A F Wilson, I E T Governance Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| HAMER, Timothy Frank RESIGNED | Director | 20 May 2010 | 31 Jul 2017 | United Kingdom | July 1962 | 12, Byron Road, Harpenden, Hertfordshire, AL5 4AB, United Kingdom |
| HARRISON, Simon Charles Andrew, Dr RESIGNED | Director | 01 Nov 2017 | 30 Sep 2020 | England | July 1963 | Savoy Place, London, WC2R 0BL |
| HART, Simon David, Dr RESIGNED | Director | 01 Oct 2023 | 30 Sep 2026 | United Kingdom | March 1975 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| HAWTHORNE, Stephen Richard RESIGNED | Director | 04 Sep 2017 | 06 Apr 2018 | United Kingdom | June 1971 | Savoy Place, London, WC2R 0BL |
| HLAING, Thomas, Eur Ing RESIGNED | Director | 10 Oct 2016 | 30 Sep 2018 | England | November 1981 | Savoy Place, London, WC2R 0BL |
| HURST, Rachel RESIGNED | Director | 01 Oct 2021 | 30 Sep 2023 | England | June 1971 | C/O A F Wilson, I E T Governance Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| JACKSON, Paul Alan RESIGNED | Director | 26 Jan 2005 | 12 Dec 2007 | United Kingdom | April 1961 | 24 Northampton Square, London, EC1V 0HL |
| MCCRIRRICK, Thomas Bryce, Dr RESIGNED | Director | 21 Aug 1998 | 01 Oct 2001 | | July 1927 | Surrey Place Coach, Coach House Gardens Elvetham Road, Fleet, Hampshire, GU13 8QX |
| MCGILL, Robin William RESIGNED | Director | 21 Feb 2007 | 02 Jun 2009 | Scotland | August 1955 | 22 Newlands, Kirknewton, EH27 8LR |
| PORTER, Colin Howard RESIGNED | Director | 10 Dec 2007 | 30 Sep 2011 | England | March 1950 | 16 Milebush, Leighton Buzzard, Bedfordshire, LU7 2UB |
| RIDING, Stephen RESIGNED | Director | 30 Nov 1999 | 26 Jan 2005 | | June 1949 | 4 Wymondley Close, Hitchin, Hertfordshire, SG4 9PW |
| RIDING, Stephen RESIGNED | Director | 12 Jun 1998 | 15 Feb 1999 | | June 1949 | 4 Wymondley Close, Hitchin, Hertfordshire, SG4 9PW |
| ROBERTS, Alfred, Dr RESIGNED | Director | 14 Jun 1999 | 06 Feb 2007 | | June 1945 | 34 Biddenham Turn, Biddenham, Bedford, Bedfordshire, MK40 4AZ |
| RODD, Michael Godfrey, Pld Dsc Ceng Fiee RESIGNED | Director | 21 Aug 1998 | 24 Dec 2002 | | June 1946 | 12 The Cloisters, Church Street, Old Woking, Surrey, GU22 9JB |
| WARD, Nigel RESIGNED | Director | 01 Oct 2014 | 30 Sep 2016 | England | March 1964 | 6, Escombe Drive, Guildford, Surrey, GU2 9RE, England |
| WHITE, Simon Paul RESIGNED | Director | 01 Oct 2023 | 30 Jun 2025 | United Kingdom | January 1970 | Iet Legal Department, Savoy Place, London, WC2R 0BL, United Kingdom |
| WILLIAMS, John Charles, Dr RESIGNED | Director | 12 Jun 1998 | 14 Jun 1999 | | July 1938 | Beightons Bassetts Lane, Little Baddow, Chelmsford, Essex, CM3 4DA |
| INSTANT COMPANIES LIMITED RESIGNED | Nominee Director | 19 May 1998 | 12 Jun 1998 | | | 1, Mitchell Lane, Bristol, Avon, BS1 6BU |