| CLARK, Howard David ACTIVE | Director | 20 Feb 2007 | | England | November 1962 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| MLADENOV, Tihomir Evgeniev, Mr. ACTIVE | Director | 02 Jan 2024 | | Netherlands | July 1976 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| WALLACE, Grahame, Mr. ACTIVE | Director | 02 Jan 2024 | | England | February 1966 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| BORROWDALE, Julie Anne RESIGNED | Secretary | 08 Dec 2010 | 08 Apr 2013 | | | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| HEWETT, John Carr Bell RESIGNED | Secretary | 01 Jan 1993 | 31 May 1999 | | | The Old Vicarage, Ugthorpe, Whitby, North Yorkshire, YO21 2BQ |
| KENDAL, Ronald William RESIGNED | Secretary | | 31 Dec 1992 | | | 2 Cleveland Drive, Marton In Cleveland, Middlesbrough, Cleveland, TS7 8AE |
| PACE BONELLO, Alexander Francis RESIGNED | Secretary | 01 Jun 1999 | 11 Aug 2004 | | | Waratah 6a High Street, Great Broughton, Middlesbrough, Cleveland, TS9 7EH |
| POS, Femke RESIGNED | Secretary | 21 May 2015 | 01 Dec 2017 | | | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| SIMPSON, John Paul RESIGNED | Secretary | 01 Jul 2004 | 26 Oct 2010 | | | Greenacres, Skelton Road Langthorpe, Boroughbridge, North Yorkshire, YO51 9BZ |
| SMEETS, Celine RESIGNED | Secretary | 20 Feb 2018 | 24 Sep 2024 | | | Prinsenhof Building, Koningin Wilhelminaplein 30, 1062 Kr, Amsterdam, Netherlands |
| SUNLEY, Mairead RESIGNED | Secretary | 09 Apr 2013 | 05 Dec 2014 | | | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| ARIAV, Yarom RESIGNED | Director | 30 Apr 2002 | 15 Jul 2006 | | June 1954 | 7-2 Hasnunit St, Mevaseret, 90805, Israel |
| BAINES, Philip RESIGNED | Director | 20 Mar 2007 | 22 Jan 2015 | England | June 1962 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| BEN HAMOU, Jacob RESIGNED | Director | 11 Dec 2017 | 05 Aug 2021 | Netherlands | September 1963 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| BORROWDALE, Julie Anne RESIGNED | Director | 20 Mar 2007 | 08 Apr 2013 | United Kingdom | March 1959 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| BURNELL, Peter Charles Desborough RESIGNED | Director | 13 Dec 1993 | 07 May 1999 | England | May 1941 | Stagshaw House, Corbridge, Northumberland, NE45 5PG |
| CATHER, David Connal RESIGNED | Director | 01 Sep 1999 | 30 Apr 2002 | England | August 1959 | Keepers Retreat, 6 Mill Close Old Birstall, Leicester, Leicestershire, LE4 4EN |
| CHILTON, Frank RESIGNED | Director | | 31 May 1995 | | February 1933 | The Alders, Grosmont, Whitby, North Yorkshire, YO22 5QL |
| CLARKE, Graham RESIGNED | Director | 17 Aug 2004 | 27 Oct 2011 | United Kingdom | October 1963 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| COCKCROFT, Roger Edward RESIGNED | Director | 07 Dec 1994 | 30 Aug 2002 | | January 1941 | Wyke House, Littlethorpe, Ripon, North Yorkshire, HG4 3LG |
| DEGEN, Steven Michael RESIGNED | Director | 01 Jan 2011 | 23 Jan 2015 | Netherlands | April 1967 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| DEUCHAR, Allan David RESIGNED | Director | | 09 Feb 1995 | | March 1935 | 53 5th Avenue, Illova, Sandton 2196, South Africa |
| DRAPER, John RESIGNED | Director | 13 Dec 1993 | 23 Jan 1996 | | April 1941 | Applewood, The Green Biddestone, Chippenham, Wiltshire, SN14 7DG |
| DREYFUSS, Jaakov Israel RESIGNED | Director | 05 Aug 2021 | 02 Jan 2024 | Netherlands | May 1981 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| EVANS, James Mcneilly RESIGNED | Director | 09 Feb 1995 | 30 Apr 2002 | | May 1941 | 70 South Approach, Moor Park, Northwood, Middlesex, HA6 2ET |
| FULTON, Andrew John RESIGNED | Director | 22 May 2019 | 01 Sep 2022 | England | April 1973 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| GIBBS, George James RESIGNED | Director | 12 Feb 1992 | 15 Mar 1993 | | March 1933 | 33 Cherry Glebe, Mersham, Ashford, Kent, TN25 6NL |
| GIBSON, Christopher John RESIGNED | Director | 17 Aug 2004 | 31 Jan 2007 | | January 1957 | Plumtree Cottage, Scaling Easington, Saltburn By The Sea, North Yorkshire, TS13 4TR |
| GILCHRIST, Ian Christopher Robertson, Dr RESIGNED | Director | 07 May 1999 | 30 Sep 2004 | | August 1959 | 6 Trafalgar Terrace, Redcar, Cleveland, TS10 1QQ |
| GLAZER, Eli RESIGNED | Director | 23 Jan 2015 | 05 May 2017 | Germany | October 1956 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| GOLD, Yehoshua RESIGNED | Director | 30 Apr 2002 | 18 Dec 2002 | | December 1952 | Derch Metar, 102 Metar, Israel, FOREIGN |
| GOLDSTEIN, Isaac RESIGNED | Director | 30 Apr 2002 | 18 Dec 2002 | | July 1952 | Valeriusstraat 17, Amsterdam, 1071 Mb, Netherlands |
| GOLDSTEIN, Noam RESIGNED | Director | 30 Apr 2002 | 30 Jun 2005 | | July 1960 | 27 Ziporen St Omer, Israel, 4052 POB |
| HEWETT, John Carr Bell RESIGNED | Director | 07 Dec 1994 | 31 May 1999 | United Kingdom | May 1940 | The Old Vicarage, Ugthorpe, Whitby, North Yorkshire, YO21 2BQ |
| HOLYFIELD, Graham William RESIGNED | Director | 27 Oct 1995 | 07 May 1999 | | May 1941 | Lowgarth, Fryupdale, Whitby, North Yorkshire |
| JACKSON, Francis Keith John RESIGNED | Director | 07 Feb 1997 | 30 Apr 2002 | England | May 1949 | The Artists House, Station Road Goring On Thames, Reading, Berkshire, RG8 9HA |
| KING, Michael Wallis RESIGNED | Director | | 13 Dec 1993 | | March 1937 | Bagatelle, 21 Killarney Road, Sandhurst, 2196, South Africa |
| KIRSTEN, Marc Michael RESIGNED | Director | 17 May 2016 | 23 Dec 2017 | England | October 1971 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| LANGVELD, Cornelis Petrus RESIGNED | Director | 18 Dec 2002 | 24 Sep 2012 | Netherlands | February 1952 | Zuiderweg 89 1461 Gg, Zuidoostbeemster, Netherlands |
| LAYBOURNE, Robert Anthony RESIGNED | Director | 09 Feb 1995 | 01 Jul 2004 | | November 1944 | The Willows Aislaby Road, Eaglescliffe, Stockton On Tees, Cleveland, TS16 0JJ |
| LEA, Anthony William RESIGNED | Director | 13 Dec 1993 | 30 Apr 2002 | United Kingdom | November 1948 | 22 The Crescent, Barnes, London, SW13 0NN |
| LOCKERBIE, John Ross RESIGNED | Director | 01 Sep 1998 | 20 Sep 2002 | | January 1953 | 21 Branham Down, Guisborough, Cleveland, TS14 7BY |
| MARSDEN, Michael Howard RESIGNED | Director | 20 Aug 2003 | 31 Aug 2004 | | March 1944 | The Cottage, 4 Daleside, Staithes, North Yorkshire, TS13 5DT |
| MARX, Rainer RESIGNED | Director | 30 Apr 2002 | 23 Jan 2015 | Netherlands | August 1948 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| MAXWELL, Arthur Stephen RESIGNED | Director | 07 Dec 1994 | 31 Dec 1996 | | November 1936 | Hanover Cottage Prospect Hill, Whitby, North Yorkshire, YO21 1QE |
| MEWETT, Malcolm John RESIGNED | Director | 01 Sep 2022 | 31 Oct 2023 | United Kingdom | April 1963 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| NAIRN, William RESIGNED | Director | 11 Feb 2000 | 30 Apr 2002 | | December 1944 | 87 Central Avenue, Athol, Sandton, Gauteng, 2196, South Africa |
| PACE BONELLO, Alexander Francis RESIGNED | Director | 01 Jun 1999 | 11 Aug 2004 | | February 1957 | Waratah 6a High Street, Great Broughton, Middlesbrough, Cleveland, TS9 7EH |
| PACE-BONELLO, Alexander Francis RESIGNED | Director | 02 Nov 1993 | 13 Dec 1993 | | February 1957 | 1 Fieldfares, London Colney, Hertfordshire, AL2 1SJ |
| PETTIT, Richard Anthony RESIGNED | Director | 27 Oct 1995 | 31 Aug 1998 | | February 1938 | Stonecroft 29 Wades Lane, East Barnby, Whitby, North Yorkshire, YO21 3SB |
| PRETORIUS, Theodor Ludwig RESIGNED | Director | | 15 Mar 1993 | | March 1933 | 1 Edgewood Avenue, Birdhaven, Johannesburg, Transvaal 2196, FOREIGN, South Africa |
| RELLY, Gavin Walter Hamilton RESIGNED | Director | | 13 Dec 1993 | | February 1926 | Melrose House, Melrose Street Melrose, Johannesburg, Transvaal 2196, South Africa |
| ROBERTSON, Robert Sinclair RESIGNED | Director | 07 May 1999 | 30 Apr 2002 | England | December 1951 | The Village House, Bradfield, Berkshire, RG7 6BH |
| ROBERTSON, Robert Sinclair RESIGNED | Director | | 05 Feb 1999 | England | December 1951 | The Village House, Bradfield, Berkshire, RG7 6BH |
| SHUSHAN, Ronnie RESIGNED | Director | 24 Sep 2012 | 20 Jun 2014 | Netherlands | October 1967 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| SIMOES CARRELO, Joao Paulo RESIGNED | Director | 15 Dec 2004 | 30 Jun 2005 | | August 1959 | Av Diagonal 650 5 1a, Barcelona, 08017, Spain |
| SLACK, Henry Richmond RESIGNED | Director | 05 Feb 1999 | 07 May 1999 | | February 1950 | The Studio House, 117 Ladbroke Road, London, W11 3PR |
| VAN SCHIE, Antonius Martinus Sylvester RESIGNED | Director | 01 Jul 2005 | 01 Jan 2011 | Netherlands | November 1947 | Ruys De Beerenbrouckstraat 29, 2613 As Delft, Netherlands |
| WADESON, Timothy Charles Aylmer RESIGNED | Director | 13 Dec 1993 | 31 Dec 1999 | | August 1936 | 14 Gayre Drive, Sandown Ext 9, Sandton, 2196, South Africa |
| WILKINSON, Geoffrey Allan RESIGNED | Director | 12 Feb 1992 | 13 Dec 1993 | England | April 1947 | 18 The Findings, Farnborough, Hampshire, GU14 9EG |
| ZUIDERWIJK, Ronald Johannes Nicolaas RESIGNED | Director | 23 Jan 2015 | 28 Feb 2018 | England | April 1970 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |
| ZVIDA, David RESIGNED | Director | 23 Jan 2015 | 17 May 2016 | England | February 1962 | Boulby Mine, Loftus, Saltburn By The Sea, Cleveland, TS13 4UZ |