| HENEGHAN, Rushna Tejani ACTIVE | Secretary | 01 Jan 2021 | | | | Elphinstone Research Centre, Tranent, EH33 2NE |
| BATHGATE, Brian, Dr ACTIVE | Director | 25 Oct 2005 | | Scotland | September 1959 | Elphintone Research Centre, Tranent, East Lothian, EH33 2NE |
| BURNS, Geoffrey ACTIVE | Director | 10 Jan 2024 | | Scotland | June 1963 | Elphinstone Research Centre, Tranent, EH33 2NE |
| HENEGHAN, Rushna Tejani ACTIVE | Director | 01 Jan 2021 | | United States | June 1963 | 251, Ballardvale Street, Wilmington, Massachusetts 01887, United States |
| COWAN, Desmond Joseph Paul Edward RESIGNED | Secretary | 16 Apr 2004 | 20 Oct 2004 | | | 52 Leith Walk, Edinburgh, Midlothian, EH6 5HW |
| DAVIDSON, Doreen RESIGNED | Secretary | 31 Mar 1990 | 20 Oct 2004 | | | 52 Leith Walk, Edinburgh, Midlothian, EH6 5HB |
| JOHST, David RESIGNED | Secretary | 20 Oct 2004 | 20 May 2020 | | | Elpinstone Research Centre, Tranent, East Lothian, EH33 2NE |
| LESLIE, Stewart Gordon RESIGNED | Secretary | 13 Oct 1993 | 13 Oct 1993 | | | 11 Walker Street, Edinburgh, Midlothian, EH3 7NE |
| PRICE, Sarah Margaret RESIGNED | Secretary | 20 May 2020 | 31 Dec 2020 | | | Elphinstone Research Centre, Tranent, EH33 2NE |
| THOMSON, Leonard RESIGNED | Secretary | | 31 Mar 1990 | | | Old School Cottage 51 Whitehill Village, Dalkeith, Midlothian, EH22 2QD |
| ACKERMAN, Thomas RESIGNED | Director | 20 Oct 2004 | 15 May 2015 | Usa | June 1954 | Elphinstone Research Centre, Tranent, East Lothian, EH33 2NE |
| BATHGATE, Brian, Dr RESIGNED | Director | 22 Jan 1997 | 20 Oct 2004 | | September 1959 | 100 Riccarton Mains Road, Currie, Edinburgh, EH14 5WB, Scotland |
| CASSELS, Alexander RESIGNED | Director | 30 Nov 1988 | 28 Jun 1989 | | April 1930 | 634 Queensferry Road, Edinburgh, Midlothian, EH4 6DZ |
| COWAN, Desmond Joseph Paul Edward RESIGNED | Director | 23 Jul 2003 | 20 Oct 2004 | | February 1961 | 52 Leith Walk, Edinburgh, Midlothian, EH6 5HW |
| CURRIE, Alastair, Sir RESIGNED | Director | | 28 Jun 1989 | | October 1921 | 42 Murrayfield Avenue, Edinburgh, EH12 6AY |
| DRAFFAN, George Harry, Dr RESIGNED | Director | | 28 Jun 1989 | | | 44 Glassel Park Road, Longniddry, East Lothian, EH32 0PA |
| FOSTER, James RESIGNED | Director | 20 Oct 2004 | 15 May 2015 | Usa | November 1950 | Elpinstone Research Centre, Tranent, East Lothian, EH33 2NE |
| JOHST, David RESIGNED | Director | 20 Oct 2004 | 20 May 2020 | United States | December 1961 | Elpinstone Research Centre, Tranent, East Lothian, EH33 2NE |
| LESLIE, Stewart Gordon RESIGNED | Director | 13 Oct 1993 | 16 Apr 2004 | | March 1953 | 11 Walker Street, Edinburgh, Midlothian, EH3 7NE |
| MAIN, Peter Tester RESIGNED | Director | | 28 Jun 1989 | | March 1925 | Lairig Ghru, Dulnain Bridge, Grantown On Spey, Highland, PH26 3NT |
| MOLHO, Davide RESIGNED | Director | 15 May 2015 | 02 Aug 2018 | United States | January 1970 | Elpinstone Research Centre, Tranent, East Lothian, EH33 2NE, United Kingdom |
| NEWMAN, Henry Bernard RESIGNED | Director | | 20 Sep 1999 | United Kingdom | July 1929 | The Birches, Fishers Wood, Sunningdale, Ascot, Berkshire, SL5 0JF |
| NIMMO, Walter Sneddon, Dr RESIGNED | Director | 22 Jan 1997 | 20 Oct 2004 | | April 1947 | 46 Millar Crescent, Edinburgh, EH10 5HH, Scotland |
| PRICE, Sarah Margaret RESIGNED | Director | 20 May 2020 | 31 Dec 2020 | England | May 1958 | Elphinstone Research Centre, Tranent, EH33 2NE |
| ROMOLI, Andrea RESIGNED | Director | 06 Jun 2022 | 02 Jun 2023 | United States | January 1974 | 251, Ballardvale Street, Wilmington, Massachusetts 01887, United States |
| SCHAAD, Peter RESIGNED | Director | | 01 Jun 1991 | | October 1947 | 26 Hyde Park Gate, London, SW7 5DJ |
| SMITH, David Ross RESIGNED | Director | 15 May 2015 | 06 Jun 2022 | United Kingdom | September 1965 | Elpinstone Research Centre, Tranent, East Lothian, EH33 2NE, United Kingdom |
| SWORD, Ian Pollock, Doctor RESIGNED | Director | | 04 May 2004 | | March 1942 | Spingwell Farm, Talkin, Brampton, Cumbria, CA8 1LE |
| THOMSON, Leonard RESIGNED | Director | | 23 Aug 1993 | | October 1934 | Old School Cottage 51 Whitehill Village, Dalkeith, Midlothian, EH22 2QD |
| WILSON, Alexander Biggart RESIGNED | Director | | 28 Jun 1989 | United Kingdom | September 1942 | Chesterhall House, Longniddry, East Lothian, EH32 0PQ |
| WISEMAN, Herbert Colin RESIGNED | Director | | 02 Aug 1996 | | July 1945 | Ballytrim Gosford Road, Longniddry, East Lothian, EH32 0LF, Scotland |