| MCGREGOR, Kirsty Anne ACTIVE | Secretary | 22 Jun 2023 | | | | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| AL, Baydu Can ACTIVE | Director | 22 Jun 2023 | | England | September 1989 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| BRADLEY, Paul John ACTIVE | Director | 30 Jun 2010 | | England | August 1975 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| CARTER, Darren ACTIVE | Director | 02 Jul 2026 | | England | January 1973 | 31, Arundel Road, Marston Moretaine, Bedford, MK43 0JZ, England |
| CURTIS, David Thomas, Prof ACTIVE | Director | 22 Jun 2023 | | England | March 1982 | Advanced Manufacturing Research Centre (Amrc), Wallis Way, Catcliffe, Rotherham, S60 5TZ, England |
| FISH, Michael Anderson ACTIVE | Director | 26 Jun 2012 | | England | June 1971 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| HOPKINS, Peter ACTIVE | Director | 22 Jun 2010 | | England | May 1967 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| O'HARA, Joseph Lawrence ACTIVE | Director | 24 Jun 2021 | | England | January 1997 | Reliance Precision Limited, Rowley Mills, Lepton, Huddersfield, HD8 0LE, United Kingdom |
| PENNING, Graham Michael ACTIVE | Director | 30 Jun 2009 | | England | March 1950 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| RADLEY, David Francis ACTIVE | Director | 22 Jun 2023 | | England | January 1968 | Davall Gears, Travellers Lane, North Mymms, Hatfield, AL9 7JB, England |
| SHAW, Brian, Dr ACTIVE | Director | 21 Jun 2006 | | England | June 1970 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| WINGROVE, Roger ACTIVE | Director | 22 Jun 2023 | | England | December 1962 | Newmont Engineering, Fleming Way, Isleworth, TW7 6EU, England |
| WRIGHT, Peter George ACTIVE | Director | 29 Jun 2004 | | Wales | December 1954 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| ELLIOTT, Shirley RESIGNED | Secretary | 19 Sep 2006 | 23 Mar 2016 | | | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, England |
| GILL, Denise Allison Mary RESIGNED | Secretary | 24 Mar 2016 | 22 Jun 2023 | | | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, England |
| HAW, Roger RESIGNED | Secretary | 02 Apr 1993 | 19 Sep 2000 | | | 5 Old Manor Drive, Oxspring, Sheffield, S36 8ZY |
| KIRK, Joseph Henry RESIGNED | Secretary | 19 Sep 2000 | 19 Sep 2006 | | | 59 Kenilworth Road, Macclesfield, Cheshire, SK11 8UX |
| ASKEW, Michael John RESIGNED | Director | 02 Apr 1993 | 29 Nov 2001 | United Kingdom | April 1960 | Higher Farmhouse 10 Church Street, Merriott, Somerset, TA16 5PR |
| BARBER, Cedric RESIGNED | Director | 26 Jun 2001 | 31 Dec 2002 | | August 1937 | 142 Kiln Lane, Milnrow, Rochdale, Lancashire, OL16 3HA |
| BARNETT, David William RESIGNED | Director | 24 Jun 2003 | 26 Jun 2007 | | November 1944 | 14 Mayfield, Harwood, Bolton, BL2 3LP |
| BATCHELOR, Kenneth Malcolm RESIGNED | Director | 02 Apr 1993 | 08 Dec 1999 | | November 1935 | 13 Fawsley Leys, Rugby, Warwickshire, CV22 5QY |
| BRICKNELL, Reginald George RESIGNED | Director | 28 Jun 2000 | 25 Aug 2013 | England | August 1935 | Inglewood House 17 Church Street, Elsham, Brigg, North Lincolnshire, DN20 0RG |
| BRICKNELL, Reginald George RESIGNED | Director | 02 Apr 1993 | 10 Dec 1999 | England | August 1935 | Inglewood House 17 Church Street, Elsham, Brigg, North Lincolnshire, DN20 0RG |
| BRIMMELL, Clive Francis William RESIGNED | Director | 10 Sep 1996 | 29 Nov 2001 | | October 1951 | 14 Ryelands, Wyre Piddle, Pershore, Worcestershire, WR10 2JG |
| BUCKLEY, Shawn Anthony RESIGNED | Director | 17 Nov 2016 | 30 Oct 2019 | England | October 1963 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, England |
| BURDETT, Roger Leonard RESIGNED | Director | 02 Apr 1993 | 01 Jun 1997 | | September 1950 | 67 St Davids Court, Sherborne Street, Manchester, M8 8NT |
| CLEGG, David RESIGNED | Director | 22 Jun 1999 | 20 Jul 2001 | | October 1942 | 2 Weldon Drive, Huddersfield, HD3 3FZ |
| CLEGG, David RESIGNED | Director | 02 Apr 1993 | 10 Jul 1997 | | October 1942 | 110 Laund Road, Salendine Nook, Huddersfield, West Yorkshire, HD3 3TY |
| COOK, Ben Douglas RESIGNED | Director | 20 Jun 2019 | 22 Jun 2023 | United Kingdom | April 1984 | University Of Sheffield Amrc, Wallis Way, Catcliffe, Rotherham, S60 5TZ, England |
| CRISTINACCE, Michael RESIGNED | Director | 27 Sep 1993 | 29 Mar 2002 | | September 1946 | 21 Manor Road, Brampton Bierlow, Rotherham, South Yorkshire, S63 6BJ |
| ELDRED, Alan Herbert RESIGNED | Director | 03 Dec 1998 | 30 Aug 2001 | | July 1942 | 33 Chisenhale, Orton Waterville, Peterborough, PE2 5FP |
| ENGLISH, Martyn Philip RESIGNED | Director | 22 Jun 2010 | 31 Aug 2014 | England | June 1963 | Suite 59, Imex Business Centre, Shobnall Road, Burton On Trent, Staffordshire, DE14 2AU |
| GARTHWAITE, Nicholas James RESIGNED | Director | 24 Jun 2003 | 22 Jun 2010 | England | January 1957 | South Piece Cottage, Bleach Mill Lane, Menston, Nr. Ikley, West Yorkshire, LS29 6AW, United Kingdom |
| GASKELL, Roy RESIGNED | Director | 02 Apr 1993 | 12 Jul 1995 | | June 1937 | 9 Alpine Drive, Royton, Oldham, Lancashire, OL2 5HB |
| GLOVER, John Sefton RESIGNED | Director | 20 Jun 2019 | 24 Jun 2021 | England | March 1972 | Reliance Precision, Rowley Mills, Lepton, Huddersfield, HD8 0LE, England |
| HARRIS, Trevor Huntley RESIGNED | Director | 08 Apr 1998 | 31 Jul 1998 | | October 1934 | 18 Holystone Avenue, Regent Farm, Newcastle Upon Tyne, NE3 3HN |
| HAW, Roger RESIGNED | Director | 02 Apr 1993 | 17 Jan 2011 | England | December 1945 | 5 Old Manor Drive, Oxspring, Sheffield, S36 8ZY |
| HEWITT, John Michael RESIGNED | Director | 02 Apr 1993 | 13 Aug 1998 | | June 1936 | 28 Spearhill, Lichfield, Staffordshire, WS14 9UD |
| HIGHAM, David RESIGNED | Director | 26 Jun 2007 | 12 Mar 2010 | England | July 1950 | 3 Trefoil Close, Rushden, Northamptonshire, NN10 0PN |
| HOFMANN, Dieter Adolf, Professor RESIGNED | Director | 02 Apr 1993 | 31 Dec 2005 | | January 1941 | Half Moon House, Kirkwhelpington, Newcastle Upon Tyne, Northumberland, NE19 2RZ |
| HOLROYD, Robert Edward RESIGNED | Director | 02 Apr 1993 | 01 Jul 1994 | | January 1938 | 11 The Dell, Huddersfield, West Yorkshire, HD2 2FD |
| HORSFALL, Stephen RESIGNED | Director | 26 Jun 2001 | 13 Jun 2002 | United Kingdom | February 1954 | 33 The Oaklands, Droitwich, Worcestershire, WR9 8AD |
| HOYLE, David John RESIGNED | Director | 02 Nov 1993 | 28 May 1999 | | August 1947 | 10 Berwick Close, Woodloes Park, Warwick, Warwickshire, CV34 5UF |
| HYDE, Thomas Horace, Professor RESIGNED | Director | 24 Jun 2003 | 05 Mar 2008 | | October 1949 | 77 Arundel Drive, Bramcote, Nottingham, Nottinghamshire, NG9 3FN |
| IDELL, John Anthony RESIGNED | Director | 02 Apr 1993 | 30 Oct 1998 | | March 1935 | York House Uppingham Road, Caldecott, Market Harborough, Leicestershire, LE16 8RX |
| JACKSON, David Paul RESIGNED | Director | 28 Jun 2011 | 13 Apr 2016 | England | December 1954 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, England |
| KERSHAW, Ronald Berry RESIGNED | Director | 23 Jun 1997 | 29 Dec 2000 | | June 1946 | 18 Priestley Way, Uplands Park,Shaw, Oldham, Lancashire, OL2 8HU |
| KIRK, Joseph Henry RESIGNED | Director | 09 Nov 1999 | 12 Apr 2018 | England | July 1944 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, England |
| KOHLER, Hellmuth Karl RESIGNED | Director | 02 Apr 1993 | 28 Jun 2002 | | March 1931 | 63 Pingle Road, Sheffield, S7 2LL |
| LING, John Richard RESIGNED | Director | 10 Dec 1999 | 30 Jun 2009 | | February 1943 | 1 Willow Cottages, Auckland Road East, Southsea, Hampshire, PO5 2HE |
| MAILLARDET, Paul Wenban RESIGNED | Director | 02 Apr 1993 | 18 Feb 2005 | | March 1952 | 18 Chepston Place, Trowbridge, Wiltshire, BA14 9TA |
| MARRIAGE, Roger RESIGNED | Director | 21 Jun 2006 | 31 Dec 2009 | | December 1966 | Honeysuckle Cottage, Babcary, Somerset, TA11 7DT |
| MARSH, Thomas Vivian RESIGNED | Director | 02 Feb 1998 | 12 Aug 1998 | | October 1956 | 11 Wickham Rise, Frome, Somerset, BA11 2JJ |
| MARWAHA, Amarjit RESIGNED | Director | 22 Jun 1999 | 12 Oct 2001 | | July 1951 | 34 Polperro Drive, Coventry, West Midlands, CV5 7PU |
| MBA, David Uzochukwesi, Professor RESIGNED | Director | 22 Jun 2010 | 11 Apr 2011 | England | December 1968 | Suite 59, Imex Business Centre, Shobnall Road, Burton On Trent, Staffordshire, DE14 2AU |
| MCCANN, Michael RESIGNED | Director | 26 Jun 2007 | 28 Jun 2011 | United Kingdom | January 1950 | Suite 59, Imex Business Centre, Shobnall Road, Burton On Trent, Staffordshire, DE14 2AU |
| MCCANN, Michael RESIGNED | Director | 26 Jun 2001 | 28 Apr 2004 | | January 1950 | Alderley 157 Longedge Lane, Wingerworth, Chesterfield, Derbyshire, S42 6PR |
| MILEHAM, John Raymond RESIGNED | Director | 27 Sep 1993 | 29 Mar 2002 | | April 1938 | 6 Conifer Crest, Newbury, Berkshire, RG14 6RT |
| MOUNTNEY, Michael John RESIGNED | Director | 28 Jun 2011 | 22 Apr 2015 | England | November 1967 | Suite 59, Imex Business Centre, Shobnall Road, Burton On Trent, Staffordshire, DE14 2AU |
| MUNRO, Robert Gordon, Professor RESIGNED | Director | 02 Apr 1993 | 23 Jun 1997 | | September 1934 | 7 Field Head Long Lane, Shepley, Huddersfield, West Yorkshire, HD8 8DR |
| MURRELL, Peter William RESIGNED | Director | 28 Jun 2011 | 24 Jun 2021 | England | June 1940 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, England |
| MURRELL, Peter William RESIGNED | Director | 02 Apr 1993 | 29 Nov 2001 | England | June 1940 | 8 Dane Avenue, Barrow In Furness, Cumbria, LA14 4JS |
| NADIN, Simon Peter John RESIGNED | Director | 22 Jun 2010 | 26 Jun 2012 | United Kingdom | July 1970 | Suite 59, Imex Business Centre, Shobnall Road, Burton On Trent, Staffordshire, DE14 2AU |
| NEWBERRY, Paul Terence RESIGNED | Director | 30 Jun 2010 | 30 Oct 2015 | England | May 1959 | Suite 59, Imex Business Centre, Shobnall Road, Burton On Trent, Staffordshire, DE14 2AU |
| NOBLE, David Stanley, Dr RESIGNED | Director | 06 Sep 1996 | 30 Oct 1999 | | May 1943 | 4 Kilham Lane, Winchester, Hampshire, SO22 5PS |
| OPPERMAN, John Michael RESIGNED | Director | 02 Apr 1993 | 04 Jun 1998 | England | June 1933 | Naykers Hall, Eastham, Tenbury Wells, Worcestershire, WR15 8PB |
| PENNING, Graham Michael RESIGNED | Director | 13 Jun 2002 | 24 Feb 2007 | England | March 1950 | 36 Riley Park, Kirkburton, Huddersfield, West Yorkshire, HD8 0SA |
| PILKINGTON, Craig Edward RESIGNED | Director | 10 Dec 1999 | 31 May 2002 | | March 1950 | 233 Huddersfield Road, Thongsbridge, Huddersfield, West Yorkshire, HD7 2TT |
| POLAK, Thomas Alexander RESIGNED | Director | 23 Jun 1997 | 11 May 1998 | | October 1956 | 1 Red Lion Lane, Farnham, Surrey, GU9 7QN |
| RAYNER, Clive RESIGNED | Director | 22 Jun 1999 | 28 Jun 2002 | England | June 1947 | 17 Staverton Close, Coventry, West Midlands, CV5 7LF |
| RAYNER, David Antony RESIGNED | Director | 02 Apr 1993 | 28 May 1999 | | December 1937 | Old Barn House High Street, Kirk Deighton, Wetherby, West Yorkshire, LS22 4DX |
| RIDING, Stuart Hadrian RESIGNED | Director | 08 Jun 1994 | 31 Oct 1994 | | April 1935 | 39 South Road, Bretherton, Preston, Lancashire, PR5 7AB |
| ROBINS, Terrence Leslie RESIGNED | Director | 02 Apr 1993 | 28 Jun 1996 | | May 1938 | 61 Park Crescent, Twickenham, TW2 6NS |
| ROBINSON, David George RESIGNED | Director | 28 Jun 2000 | 21 Jun 2006 | | May 1939 | 10 East View, Hebburn, Tyne & Wear, NE31 2TQ |
| SANDLE, John Colin RESIGNED | Director | 06 Feb 2001 | 28 Sep 2001 | | October 1946 | 5 Allerton Drive, Upper Poppleton, York, Yorkshire, YO26 6JH |
| SCHOLZ, Axel RESIGNED | Director | 22 Jun 1999 | 28 Jun 2002 | | July 1961 | 2 Vicarage Green, Edwalton, Nottingham, Nottinghamshire, NG12 4AP |
| SERMON, Derek Gary RESIGNED | Director | 01 Nov 1994 | 09 Jan 1997 | | November 1955 | 37 Henderland Road, Bearsden, Glasgow, Strathclyde, G61 1JF, Scotland |
| SHARP, Thomas RESIGNED | Director | 24 Jun 2020 | 01 Jun 2025 | Wales | December 1974 | Compact Orbital Gears, Unit 1a, Brynberth Industrial Estate, Rhayader, LD6 5EW, Wales |
| SNIDLE, Raymond Walter, Prof RESIGNED | Director | 26 Jun 2001 | 28 Jun 2002 | | February 1945 | 18 Bettws Y Coed Road, Cyncoed, Cardiff, CF23 6PL |
| STANGER, Donald Arthur RESIGNED | Director | 02 Apr 1993 | 31 Dec 1997 | | October 1932 | 22 Turner Close, Fairlawn Park, Ryton, Tyne & Wear, NE40 3JR |
| THOMPSON, Alan Melvyn, Professor RESIGNED | Director | 21 Jun 2006 | 23 Apr 2008 | United Kingdom | September 1942 | Forge House, West Markham, Newark, Nottinghamshire, NG22 0PN |
| THOMPSON, Alan Melvyn, Professor RESIGNED | Director | 02 Apr 1993 | 27 Aug 2003 | United Kingdom | September 1942 | Forge House, West Markham, Newark, Nottinghamshire, NG22 0PN |
| VAN ZYL, Pieter Frederik RESIGNED | Director | 17 Nov 2016 | 13 Nov 2023 | United Kingdom | August 1959 | West House, King Cross Road, Halifax, West Yorkshire, HX1 1EB, United Kingdom |
| VIGOR, James Alfred RESIGNED | Director | 22 Sep 1994 | 12 Nov 1999 | England | February 1947 | The Old Vicarage, 15 Butt Lane Hepworth, Holmfirth, West Yorkshire, HD9 1TF |
| WANT, Denis Victor John RESIGNED | Director | 01 Mar 1996 | 10 Jun 1996 | | March 1936 | 11 Uplands Avenue, Finchfield, Wolverhampton, WV3 8AA |
| WEBSTER, Donald James RESIGNED | Director | 02 Apr 1993 | 02 Nov 1993 | | August 1949 | 58 Longrood Road, Bilton, Rugby, Warwickshire, CV22 7RE |
| WHITTAKER, Neil Martin RESIGNED | Director | 29 Jun 2004 | 03 Mar 2006 | England | October 1961 | 10 Spring Close, Solihull, West Midlands, B91 1RA |
| WHITWELL, Malcolm RESIGNED | Director | 14 Apr 1998 | 29 Dec 2000 | | December 1949 | 4 Stanley Gate, Mellor, Blackburn, Lancashire, BB2 7ET |
| YATES, David Edwin RESIGNED | Director | 02 Apr 1993 | 01 Jan 1996 | | June 1935 | The Hathaway Main Street, Church Lench, Evesham, Worcestershire, WR11 4UE |