| PAPINNIEMI-AINGER, Petra ACTIVE | Secretary | 06 May 2016 | | | | Unit 6 Ignite, Magna Way, Rotherham, S60 1FD, United Kingdom |
| BUGARCIC, Monalito ACTIVE | Director | 31 Aug 2020 | | Switzerland | June 1975 | Unit 6 Ignite, Magna Way, Rotherham, S60 1FD, United Kingdom |
| KAESE, Torben ACTIVE | Director | 21 Mar 2025 | | United States | May 1975 | Unit 6 Ignite, Magna Way, Rotherham, S60 1FD, United Kingdom |
| READ, Graham Francis ACTIVE | Director | 06 Nov 2018 | | England | February 1984 | Unit 6 Ignite, Magna Way, Rotherham, S60 1FD, United Kingdom |
| GIBBONS, Michael Andrew RESIGNED | Secretary | 25 Sep 1998 | 30 Sep 2003 | | | 9 Garth Way, Dronfield, Derbyshire, S18 1RL |
| HABERSHON, Terry RESIGNED | Secretary | | 05 Dec 1994 | | | 44 Huntingdon Crescent, Sheffield, South Yorkshire, S11 8AX |
| HART, James Thomas RESIGNED | Secretary | 05 Sep 2006 | 24 Feb 2011 | | | Firth House, Meadowhall Road, Sheffield, South Yorkshire, S9 1JD, United Kingdom |
| KEIGHLEY, Richard Nicholas RESIGNED | Secretary | 30 Sep 2003 | 05 Sep 2006 | | | Park View 48, Main Street, Saxby-All-Saints, Brigg, North Lincolnshire, DN20 0QB |
| MACDONALD, Neil Andrew RESIGNED | Secretary | 05 Dec 1994 | 25 Sep 1998 | | | 21 Clarendon Road, Sheffield, South Yorkshire, S10 3TQ |
| SEYMOUR, Christopher David RESIGNED | Secretary | 24 Feb 2011 | 06 May 2016 | | | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| ADAMS, David, Mr. RESIGNED | Director | 24 Apr 2018 | 31 Dec 2018 | United Kingdom | March 1983 | 26a, Atlas Way, Sheffield, S4 7QQ, England |
| AINSWORTH, Sydney RESIGNED | Director | 25 Sep 1998 | 11 Dec 2000 | | June 1941 | Highway Derwent Lane, Hathersage Hope Valley, Sheffield, Derbyshire, S32 1AS |
| BERGIN, John Charles Michael Francis RESIGNED | Director | 31 Mar 1994 | 05 Sep 2006 | England | July 1944 | 24 Northgate, Tickhill, Doncaster, South Yorkshire, DN11 9HY |
| BLAND, Peter Simon RESIGNED | Director | 26 Mar 2003 | 20 Nov 2014 | United Kingdom | December 1967 | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| BOON, Simon Andrew RESIGNED | Director | 14 Mar 2012 | 08 Jul 2015 | England | February 1965 | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| DOWDALL, Kay Louise, Dr RESIGNED | Director | 20 Nov 2014 | 15 Jan 2016 | United Kingdom | October 1969 | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| FARGAS MAS, Lluis Maria RESIGNED | Director | 09 May 2016 | 31 Aug 2020 | Switzerland | January 1966 | 26a, Atlas Way, Sheffield, S4 7QQ, England |
| FIEDLSEND, Peter RESIGNED | Director | | 30 Sep 1992 | | April 1941 | Longthorpe, Grindleford Road, Eyam, Derbyshire |
| FOSTER, Michael Franklin RESIGNED | Director | 05 Oct 2009 | 01 Oct 2010 | England | May 1962 | Firth House P O Box 644, Meadowhall Road, Sheffield, South Yorkshire, S9 1JD |
| FOX, Colin RESIGNED | Director | 01 Sep 1993 | 25 Sep 1998 | | August 1942 | La Terre, Main Street, Althorpe, Scunthorpe, North Lincolnshire, DN17 3HJ |
| GUEST, Robert Paul, Dr RESIGNED | Director | 15 Apr 2015 | 11 Jul 2018 | England | May 1979 | Firth Rixson House, 26a Atlas Way, Sheffield, South Yorkshire, S4 7QQ, England |
| HALL, David John RESIGNED | Director | 28 Mar 1991 | 04 Feb 2003 | | March 1940 | Craglands, Ashopton Road, Bamford, Hope Valley, Derbyshire, S33 0DB |
| HART, James Thomas RESIGNED | Director | 31 Oct 2006 | 24 Feb 2011 | United Kingdom | September 1972 | Firth House, Meadowhall Road, Sheffield, South Yorkshire, S9 1JD, United Kingdom |
| HOGG, Arthur RESIGNED | Director | | 31 Mar 1994 | | May 1932 | 38 Cortworth Road, Sheffield, South Yorkshire, S11 9LP |
| KIRKHAM, Philip David RESIGNED | Director | 01 Jul 2000 | 05 Sep 2006 | England | December 1952 | Lime Spinney Somersall Close, Somersall, Chesterfield, Derbyshire, S40 3SG |
| MACDONALD, Neil Andrew RESIGNED | Director | 28 Mar 1991 | 31 Oct 2006 | England | July 1956 | 21 Clarendon Road, Sheffield, South Yorkshire, S10 3TQ |
| MCIVOR, Benjamin Steven Timothy RESIGNED | Director | 08 Nov 2018 | 24 Jul 2019 | England | December 1974 | 26a, Atlas Way, Sheffield, S4 7QQ, England |
| MCKENZIE, Brian Wallace RESIGNED | Director | 15 Jan 2008 | 21 Apr 2015 | England | August 1970 | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| MORTIMER, David Curtis RESIGNED | Director | 15 Jan 2008 | 20 Nov 2014 | Usa | April 1960 | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| MUELLER, Boyd RESIGNED | Director | 24 Apr 2018 | 01 Apr 2025 | United States | March 1959 | Unit 6 Ignite, Magna Way, Rotherham, S60 1FD, United Kingdom |
| OLDROYD, Elinor Rosalie RESIGNED | Director | 01 Oct 2010 | 15 Apr 2015 | England | March 1967 | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| QUIGLEY, Martin Timothy RESIGNED | Director | 05 Oct 2009 | 08 May 2011 | England | February 1974 | Firth House P O Box 644, Meadowhall Road, Sheffield, South Yorkshire, S9 1JD |
| SEARS, Thomas Courtney RESIGNED | Director | 15 Jan 2008 | 05 Oct 2009 | | May 1957 | Snaithing Heights, 19 Clumber Road, Sheffield, South Yorkshire, S10 3LE |
| SEYMOUR, Christopher David RESIGNED | Director | 23 Feb 2011 | 09 May 2016 | England | May 1973 | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| SMITH, Andrew RESIGNED | Director | 05 Oct 2009 | 06 Jan 2015 | England | August 1964 | Firth Rixson House, 26a Atlas Way, Sheffield, S4 7QQ, England |
| SMITH, Nicholas Charles RESIGNED | Director | 14 Mar 2018 | 17 Dec 2020 | United Kingdom | October 1957 | Firth Rixson Metals, Johnson Lane, Ecclesfield, Sheffield, S35 9XH, England |
| TORN, Andrew Michael RESIGNED | Director | 06 Nov 2018 | 21 Jan 2021 | England | April 1970 | Firth Rixson Metals, Johnson Lane, Ecclesfield, Sheffield, S35 9XH, England |
| WOODS, Stephen Matthew RESIGNED | Director | 06 Nov 2018 | 12 Mar 2026 | England | July 1972 | Unit 6 Ignite, Magna Way, Rotherham, S60 1FD, United Kingdom |
| WRAGG, David RESIGNED | Director | 25 Sep 1998 | 01 Jul 2000 | | May 1945 | 10 Kirk Edge Drive, Worrall, Sheffield, S35 0AZ |