| PAPINNIEMI-AINGER, Petra ACTIVE | Secretary | 06 May 2016 | | | | C/O Tmf Group,, 13th Floor, One Angel Court, London, EC2R 7HJ, United Kingdom |
| BUGARCIC, Monalito ACTIVE | Director | 07 Sep 2020 | | Switzerland | June 1975 | C/O Tmf Group,, 13th Floor, One Angel Court, London, EC2R 7HJ, United Kingdom |
| WADHAM, Stephen Michael ACTIVE | Director | 12 Mar 2026 | | United Kingdom | March 1984 | Howmet Aerospace, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, United Kingdom |
| BERGIN, John Charles Michael Francis RESIGNED | Secretary | 12 Sep 1994 | 05 Sep 2006 | | | 24 Northgate, Tickhill, Doncaster, South Yorkshire, DN11 9HY |
| EDISBURY, Bryan Anthony RESIGNED | Secretary | | 12 Sep 1994 | | | 148 Bradshaw Meadows, Bradshaw, Bolton, Lancashire, BL2 4ND |
| HART, James Thomas RESIGNED | Secretary | 05 Sep 2006 | 24 Feb 2011 | | | Firth House PO BOX 644, Meadowhall Road, Sheffield, South Yorkshire, S9 1JD |
| SEYMOUR, Christopher David RESIGNED | Secretary | 24 Feb 2011 | 06 May 2016 | | | 26a, Atlas Way, Sheffield, S4 7QQ, England |
| BLAND, Peter Simon RESIGNED | Director | 05 Sep 2006 | 20 Nov 2014 | United Kingdom | December 1967 | Firth Rixson House, 26a Atlas Way, Sheffield, South Yorkshire, S4 7QQ, England |
| BUTLER, James Morris, Dr RESIGNED | Director | | 31 Jan 1995 | | June 1926 | 2 Byron Court, Upper Way Upper Longden, Rugeley, Staffordshire, WS15 1QD |
| CHARLESWORTH, Paul Lane RESIGNED | Director | | 04 Feb 1998 | | October 1932 | 70 Shenfield Road, Shenfield, Brentwood, Essex, CM15 8EW |
| CLAY, John Martin RESIGNED | Director | | 02 Feb 1993 | | August 1927 | Farningham House, Farningham, Dartford, Kent, DA4 0DH |
| DOWDALL, Kay Louise, Dr RESIGNED | Director | 20 Nov 2014 | 28 Jun 2019 | United Kingdom | October 1969 | 26a, Atlas Way, Sheffield, S4 7QQ, England |
| EASTON, Robert James Campbell RESIGNED | Director | 03 Feb 2003 | 05 Sep 2006 | | October 1963 | 8 Sheffield Terrace, London, W8 7NA |
| FARGAS MAS, Lluis Maria RESIGNED | Director | 09 May 2016 | 07 Sep 2020 | Switzerland | January 1966 | Firth Rixson, Johnson Lane, Ecclesfield, Sheffield, S35 9XH, England |
| HALL, David John RESIGNED | Director | | 03 Feb 2003 | | March 1940 | Craglands, Ashopton Road, Bamford, Hope Valley, Derbyshire, S33 0DB |
| HANCOCK, James Frank RESIGNED | Director | 01 Jul 2019 | 16 Dec 2022 | England | January 1978 | C/O Tmf Group, 8th Floor, 20 Farringdon Street, London, EC4A 4AB, United Kingdom |
| HARDIE, Reginald George RESIGNED | Director | | 12 Sep 1994 | | December 1938 | The Bend 451 Chester Road, Woodford, Stockport, Cheshire, SK7 1QP |
| HART, James Thomas RESIGNED | Director | 31 Oct 2006 | 24 Feb 2011 | United Kingdom | September 1972 | Firth House PO BOX 644, Meadowhall Road, Sheffield, South Yorkshire, S9 1JD |
| KADEN, Douglas Macrae RESIGNED | Director | 30 Jun 2011 | 20 Nov 2014 | Usa | November 1971 | Firth Rixson House, 26a Atlas Way, Sheffield, South Yorkshire, S4 7QQ, England |
| LLOWARCH, Martin Edge RESIGNED | Director | 23 Mar 1992 | 07 Feb 2001 | | December 1935 | Brin Cliff Edge 112 Casterton Road, Stamford, Lincolnshire, PE9 2UB |
| MACDONALD, Neil Andrew RESIGNED | Director | 23 Aug 1994 | 31 Oct 2006 | England | July 1956 | 21 Clarendon Road, Sheffield, South Yorkshire, S10 3TQ |
| MCKENZIE, Brian Wallace RESIGNED | Director | 01 Oct 2010 | 21 Apr 2015 | England | August 1970 | Firth Rixson House, 26a Atlas Way, Sheffield, South Yorkshire, S4 7QQ, England |
| MELDAL-JOHNSEN, Konrad Walter RESIGNED | Director | 10 Dec 1997 | 03 Feb 2003 | England | November 1942 | Firfield House, Firfields, Weybridge, Surrey, KT13 0UD |
| MORTIMER, David Curtis RESIGNED | Director | 15 Jan 2008 | 20 Nov 2014 | Usa | April 1960 | Firth Rixson House, 26a Atlas Way, Sheffield, South Yorkshire, S4 7QQ, England |
| PARKER, Thomas John, Sir RESIGNED | Director | 26 Aug 1999 | 03 Feb 2003 | Great Britain | April 1942 | Apt 29 Westfield, 15 Kidderpore Avenue, Hampstead London, NW3 7SF |
| RAMSARAN, Janine RESIGNED | Director | 24 Feb 2015 | 05 Oct 2015 | United States Of America | April 1958 | Firth Rixson House, 26a Atlas Way, Sheffield, South Yorkshire, S4 7QQ, United Kingdom |
| RUSSELL, Francis Mark RESIGNED | Director | | 10 Jun 1992 | | July 1927 | Armour Barn Ivy Cottages, Meadle, Aylesbury, Buckinghamshire, HP17 9UG |
| SCANLON, Anthony John, Dr RESIGNED | Director | 01 Oct 2001 | 03 Feb 2003 | | January 1944 | 46 The Shrubberies, Coventry, West Midlands, CV4 7EF |
| SEYMOUR, Christopher David RESIGNED | Director | 23 Feb 2011 | 09 May 2016 | England | May 1973 | 26a, Atlas Way, Sheffield, S4 7QQ, England |
| SMITH, Andrew RESIGNED | Director | 01 Oct 2010 | 06 Jan 2015 | England | August 1964 | Firth Rixson House, 26a Atlas Way, Sheffield, South Yorkshire, S4 7QQ, England |
| STENNING, Michael Richard RESIGNED | Director | 10 Dec 1997 | 30 Jan 2002 | | December 1945 | St Mary's Cottage The Ridgeway, Fetcham, Leatherhead, Surrey, KT22 9AZ |
| TAYLOR, Rowan Gregory Paxton RESIGNED | Director | 27 Mar 2009 | 30 Jun 2011 | United States | June 1967 | Firth House PO BOX 644, Meadowhall Road, Sheffield, South Yorkshire, S9 1JD |
| WARREN, Michael Jonathan RESIGNED | Director | 27 Mar 2009 | 20 Nov 2014 | Usa | March 1973 | Firth Rixson House, 26a Atlas Way, Sheffield, South Yorkshire, S4 7QQ, England |
| WOODS, Stephen Matthew RESIGNED | Director | 16 Dec 2022 | 12 Mar 2026 | England | July 1972 | C/O Tmf Group,, 13th Floor, One Angel Court, London, EC2R 7HJ, United Kingdom |
| WRIGHT, Antony Richard RESIGNED | Director | 03 Oct 1994 | 04 Feb 1998 | | November 1938 | 36 Woodside, Harrogate, North Yorkshire, HG1 5NG |