| BAKER, Laura Jane, Dr ACTIVE | Director | 10 Nov 2023 | | Wales | November 1974 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| CHURCH, Colin Andrew, Dr ACTIVE | Director | 25 Jan 2019 | | England | October 1966 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| MUNDAY (CBE), Janice Margaret ACTIVE | Director | 01 Apr 2022 | | England | October 1955 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| PUMMELL, David William ACTIVE | Director | 06 Jun 2022 | | England | September 1962 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| PATERSON, Andrew RESIGNED | Secretary | 01 Apr 2025 | 03 Jul 2026 | | | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| PATTON, Carol RESIGNED | Secretary | 11 Dec 2014 | 31 Mar 2025 | | | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| AITKEN, Alastair Stuart RESIGNED | Director | 29 Jul 2016 | 30 Jun 2021 | England | August 1962 | Tata Steel, The Steel Park, Steelpark Way, Wolverhampton, WV11 3SQ, England |
| ATKINS, Denise RESIGNED | Director | 14 Nov 2024 | 28 Nov 2025 | England | January 1980 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| BOLTON, Jonathan RESIGNED | Director | 31 Jan 2020 | 31 Aug 2025 | United Kingdom | August 1962 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| BOLTON, Jonathan Martin RESIGNED | Director | 29 Apr 2016 | 31 Dec 2018 | England | August 1962 | C/O Materials Processing Institute, Eston Road, Middlesbrough, Cleveland, TS6 6US, England |
| BOLTON, Jonathan Martin RESIGNED | Director | 28 Nov 2014 | 24 Mar 2016 | England | August 1962 | Commercial Centre, Brigg Road, Scunthorpe, North Lincolnshire, DN16 1BP, England |
| BRUNNOCK, Martin Simon, Dr RESIGNED | Director | 23 Mar 2018 | 19 Jul 2021 | Wales | May 1972 | Port Talbot Steelworks, Abbey Works, Margam, Port Talbot, SA13 2NG, Wales |
| BYRNE, Christopher RESIGNED | Director | 05 Mar 2015 | 01 Dec 2017 | England | October 1974 | Harsco Metals Group Limited Harsco House, Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG, England |
| CARTWRIGHT, Dean, Dr RESIGNED | Director | 24 Sep 2021 | 10 Nov 2023 | Wales | October 1970 | Tata Steel, Tata Steel, Port Talbot, SA13 2NG, Wales |
| DALE, John RESIGNED | Director | 30 Sep 2016 | 28 Sep 2018 | England | April 1967 | British Steel, Brigg Road, Scunthorpe, North Lincolnshire, DN16 1BP, England |
| DUNSMORE, Andrew Clarkson RESIGNED | Director | 25 Nov 2016 | 24 Mar 2017 | England | December 1961 | Swinden Technology Centre, Moorgate, Rotherham, S60 3AR, England |
| HAMLIN, Neville Peter RESIGNED | Director | 28 Nov 2014 | 31 May 2016 | England | January 1962 | Cpi, Wilton Centre, Wilton, Redcar, Cleveland, TS10 4RF, England |
| HARDCASTLE, Clifford, Professor RESIGNED | Director | 29 May 2015 | 29 Oct 2015 | United Kingdom | August 1950 | Teesside University, Vice Chancellor's Office, Borough Road, Middlesbrough, TS1 3BA, England |
| HILLIER, Graham Stewart RESIGNED | Director | 28 Nov 2014 | 01 Dec 2017 | England | November 1958 | J2, Wilton Centre, Wilton, Redcar, Cleveland, TS10 4RF, England |
| HODGSON, Simon Nicholas, Professor RESIGNED | Director | 01 Apr 2017 | 06 Feb 2020 | England | March 1963 | Teesside University, The Curve, 4th Floor, Southfield Road, Middlesbrough, TS1 3BX, England |
| KITSON, Paul RESIGNED | Director | 27 Nov 2015 | 08 Nov 2024 | England | June 1965 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| MCDONALD, Christopher RESIGNED | Director | 03 Mar 2014 | 10 Nov 2023 | England | September 1976 | Teeside Technology Centre, Eston Rd, Grangetown, Middlesbrough, TS6 6US, United Kingdom |
| NEAL, Richard Jonathan RESIGNED | Director | 13 Nov 2014 | 16 Jan 2026 | England | February 1959 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| OSWIN, Christopher James RESIGNED | Director | 22 Sep 2025 | 22 May 2026 | England | July 1971 | Materials Processing Institute, Eston Road, Grangetown, Middlesbrough, TS6 6US, England |
| PIKE, Simon RESIGNED | Director | 28 Nov 2014 | 29 Jul 2016 | England | June 1962 | Tata Steel R&D, Swinden Technology Centre, Moorgate, Rotherham, South Yorkshire, S60 3AR, England |
| REASBECK, Richard Brent RESIGNED | Director | 28 Nov 2014 | 27 May 2016 | United Kingdom | May 1961 | Materials Processing Insitute, Eston Road, Grangetown, Middlesbrough, North Yorkshire, TS6 6US, United Kingdom |
| RICKINSON, Bernard Alan, Dr RESIGNED | Director | 29 Apr 2016 | 21 Dec 2018 | England | January 1950 | The Institute Of Materials, Minerals And Mining, 297 Euston Road, London, NW1 3AQ, United Kingdom |
| RUDDLESTONE, Robert RESIGNED | Director | 01 Dec 2014 | 31 Mar 2021 | England | June 1948 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| VAUGHAN, Christopher, Mr. RESIGNED | Director | 02 Nov 2018 | 22 May 2019 | England | September 1971 | British Steel, Brigg Road, Scunthorpe, North Lincolnshire, DN16 1BP, United Kingdom |
| VITSE, Eric RESIGNED | Director | 29 Mar 2019 | 29 Oct 2020 | France | December 1957 | Gfg Alliance, 48 Bis Avenue Kleber, Paris, 75116, France |
| WALSH, Terence Matthew RESIGNED | Director | 01 Jul 2024 | 22 Sep 2025 | Scotland | October 1967 | Materials Processing Institute, Eston Road, Middlesbrough, TS6 6US, England |
| WIJDEKOP, Maarten, Dr RESIGNED | Director | 27 Mar 2015 | 01 Dec 2017 | Wales, Uk | March 1976 | Cpi Wilton Centre, Wilton, Redcar, Cleveland, TS10 4RF, England |