| PAUL, Christopher James ACTIVE | Secretary | 30 Nov 2017 | | | | Block 10, Diamond Power Specialty Limited, Vale Of Leven Industrial Estate, Dumbarton, G82 3AD, Scotland |
| LENZI, John Amleto ACTIVE | Director | 14 Nov 2019 | | Scotland | March 1963 | Unit 5b Heapham Road, Heapham Road Industrial Estate, Gainsborough, Lincolnshire, DN21 1RZ |
| MICHAEL, Michael Phillip ACTIVE | Director | 07 Feb 2018 | | United States | August 1964 | Unit 5b Heapham Road, Heapham Road Industrial Estate, Gainsborough, Lincolnshire, DN21 1RZ |
| SNEDDON, Alan Angus ACTIVE | Director | 15 Nov 2024 | | Scotland | March 1979 | Unit 5b Heapham Road, Heapham Road Industrial Estate, Gainsborough, Lincolnshire, DN21 1RZ |
| BILSLAND, Andrew RESIGNED | Secretary | | 19 Jul 1999 | | | Tor Uaine 54 William Street, Helensburgh, Dunbartonshire, G84 8XY |
| MURPHY, John Peter RESIGNED | Secretary | 19 Jul 1999 | 24 Aug 2007 | | | 2 Mill Of Balloch, Dalvait Road, Alexandria, Dunbartonshire, G83 8QB |
| ROBINSON, William Douglas RESIGNED | Secretary | 24 Aug 2007 | 30 Nov 2017 | | | 10 Tannoch Drive, Milngavie, Glasgow, Lanarkshire, G62 8AY |
| BARR, Maurice James RESIGNED | Director | 27 Jun 2013 | 15 Mar 2016 | United Kingdom | May 1964 | Block 10, Vale Of Leven Industrial Estate, Dumbarton, West Dunbartonshire, G82 3AD, Scotland |
| BARR, Maurice James RESIGNED | Director | 21 Apr 2009 | 18 Oct 2012 | United Kingdom | May 1964 | 3 Bank Place, Shotts, ML7 4JX |
| BILSLAND, Andrew RESIGNED | Director | 26 Sep 1996 | 18 Dec 1996 | | December 1934 | Tor Uaine 54 William Street, Helensburgh, Dunbartonshire, G84 8XY |
| BLACK, Leroy RESIGNED | Director | | 03 Aug 1998 | | April 1940 | 2032 Scenic Drive Nw, Lancaster, Fairfield County Ohio 43130, United States |
| BLACKADDER, Thomas Scott RESIGNED | Director | | 17 May 1994 | | November 1926 | Westways, 36 Argyle Street, Helensburgh, Dunbartonshire, G84 8DD |
| CARTER, Hudson Randolph RESIGNED | Director | | 10 Nov 1993 | | March 1950 | 14 Meadow Wood Drive, Granville, Ohio, Lancaster 43130, FOREIGN, Usa |
| CLESSURAS, George J RESIGNED | Director | 03 May 1995 | 03 Aug 1998 | | January 1934 | B & W Service Company, 90 East Tuscarawas Ave, Barberton, Ohio, 44203, Usa |
| COCHRANE, Gary Campbell RESIGNED | Director | 11 Jun 2018 | 15 Nov 2024 | Scotland | June 1977 | Unit 5b Heapham Road, Heapham Road Industrial Estate, Gainsborough, Lincolnshire, DN21 1RZ |
| COMPETTI, Eileen Marie RESIGNED | Director | 01 Feb 2001 | 27 Jun 2013 | Usa | April 1964 | 2951 Mudhouse Road N E, Lancaster, Ohio 43130, United States Of America |
| COX, Duncan Graham RESIGNED | Director | 30 Jun 1995 | 03 Mar 1998 | | October 1948 | 7 Burleys Close, Worth, Crawley, West Sussex, RH10 7DB |
| FEES, John RESIGNED | Director | 26 Sep 1994 | 01 Feb 1997 | | August 1957 | 8816 Chateau Drive North West, Pickerington, Fairfield County, Ohio, 43147, Usa |
| FROST, Martyn Robert RESIGNED | Director | 03 Dec 1994 | 03 Mar 1998 | | September 1950 | Woodlands, 13 The Rise, Amersham, Buckinghamshire, HP7 9AG |
| GOVERS, Richard Adie RESIGNED | Director | | 03 May 1995 | | November 1944 | 1444 Robinwood Road, Alliance, Ohio, 44601, Usa |
| HAIKOLA, Mika Jaakko RESIGNED | Director | 27 Jun 2013 | 14 Nov 2019 | Finland | May 1969 | Unit 5b Heapham Road, Heapham Road Industrial Estate, Gainsborough, Lincolnshire, DN21 1RZ |
| KELLER, David Lee RESIGNED | Director | 02 Apr 2001 | 06 Jun 2005 | | April 1954 | 5841 Penwood Drive, Wadsworth, Ohio 44281, Usa |
| KELLER, David Lee RESIGNED | Director | 01 Feb 1997 | 01 Feb 2001 | | April 1954 | 720 W Broadway, Granville, Ohio, 43203, Usa |
| KULIG, James Stanley RESIGNED | Director | | 26 Sep 1994 | | March 1951 | 441 Buckingham Lane, Lancaster Ohio, 43130, Usa |
| LACE, John Herbert RESIGNED | Director | | 17 May 1994 | | September 1934 | Brackenhurst, 13 Symington Road North, Symington, Ayrshire, KA1 5PZ |
| LANGLEY, Donald Clark RESIGNED | Director | 06 Jun 2005 | 27 Jun 2013 | Usa | August 1950 | 2534 Tamworthy Cir.Nw, North Canton, Ohio 44720, U.S.A. |
| LAW, David Gordon RESIGNED | Director | 17 May 1994 | 25 Nov 1994 | | April 1938 | 16 Wilson Avenue, Troon, Ayrshire, KA10 7AF |
| MATTSSON, Hans-Erik RESIGNED | Director | 18 Dec 1996 | 28 Feb 2005 | | August 1942 | Gladjevagen 20, Hasselby, 165 75, Sweden |
| MOSKAL, Thomas Eugene RESIGNED | Director | 28 Feb 2005 | 21 Apr 2009 | | September 1956 | 101 Mackenzie Drive, Pickerington, Ohio, 43147, Usa |
| NAISMITH, Allan Robert RESIGNED | Director | | 26 Sep 1996 | | February 1944 | 44 Queen Street, Helensburgh, Dunbartonshire, G84 9PT |
| PERRONE, Paul Edward RESIGNED | Director | | 10 Nov 1993 | | November 1942 | 1280 Wheeling Road, Lancaster, Ohio 43130, FOREIGN, Usa |
| PROSSER, John Richard RESIGNED | Director | | 17 May 1994 | | July 1942 | Hollybank Cottage Kemishford, Mayford, Woking, Surrey, GU22 0RL |
| SHEERIN, Paul RESIGNED | Director | 01 Apr 2017 | 07 Feb 2018 | Scotland | December 1967 | Block 10, Vale Of Leven Industrial Estate, Dumbarton, G82 3AD, Scotland |
| SIMMONS, Harold Lester RESIGNED | Director | | 18 Nov 1992 | | November 1948 | 4909 Clarke Street, Metairie, Louisiana 70006, FOREIGN, Usa |
| THOMPSON, John Charles, Mr. RESIGNED | Director | 18 Oct 2012 | 16 Mar 2018 | Scotland | March 1956 | Block 10, Vale Of Leven Industrial Estate, Dumbarton, G82 3AD, Scotland |
| WOOD, James Francis RESIGNED | Director | 03 Aug 1998 | 02 Apr 2001 | | March 1942 | 3581 Robert Burns Drive, Richfield, Ohio, 44286, Usa |