| WHISTLER, Christopher Claude Lashmer ACTIVE | Secretary | 04 Jun 2003 | | | | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| JANSEN, Johannes Gregorius Alphons Marie ACTIVE | Director | 10 Dec 2010 | | Usa | March 1962 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| LECLERCQ, Herve Michal ACTIVE | Director | 03 Oct 2011 | | United Kingdom | June 1962 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| OAKES, Paul Harry ACTIVE | Director | 03 Oct 2011 | | United Kingdom | November 1957 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| STUBBS, Graham Martin ACTIVE | Director | 03 Oct 2011 | | United Kingdom | February 1954 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| WHISTLER, Christopher Claude Lashmer ACTIVE | Director | 22 Mar 2010 | | England | June 1958 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| APPLEFORD, Heather Ann RESIGNED | Secretary | 01 Oct 1992 | 29 Aug 1995 | | | 20 Spoon Way, Stannington, Sheffield, South Yorkshire, S6 6EZ |
| BULLOCK, Patricia Mary RESIGNED | Secretary | 12 Nov 1997 | 07 Jun 1998 | | | Bowden Ash Upper Bowden, Pangbourne, Reading, Berkshire, RG8 8PU |
| GOULDING, Graham Thomas RESIGNED | Secretary | 07 Jun 1998 | 25 Apr 2003 | | | 126 Auckland Road, London, SE19 2RP |
| SWAYNE, Anthony William John RESIGNED | Secretary | 29 Aug 1995 | 12 Nov 1997 | | | The Old Vicarage, East Meon, Petersfield, Hampshire, GU32 1PG |
| WOOLASS, Stanley David RESIGNED | Secretary | | 30 Sep 1992 | | | 17 Ribblesdale Drive, Ridgeway, Sheffield, South Yorkshire, S12 3XB |
| BROWN, David George RESIGNED | Director | 19 Feb 1992 | 05 Jun 1995 | | August 1953 | 61 Andrew Road, Valentine, Newcastle 2280, Nsw, Australia |
| BUTLER, Geoffrey Doy Hopson RESIGNED | Director | 07 Jun 1998 | 31 Dec 2010 | England | October 1946 | Home Green Heath House Road, Worplesdon Hill, Woking, Surrey, GU22 0QU |
| CHALMERS, James Neil Scott RESIGNED | Director | 07 Jun 1998 | 22 Mar 2010 | Australia | May 1941 | 20 Newbold Close, Thirroul, New South Wales, 2515, Australia |
| CRAVEN, John Lawrence RESIGNED | Director | 19 Feb 1992 | 01 May 1995 | | November 1946 | 46 Woodhead Road, Glossop, Derbyshire, SK13 9RH |
| CUBITT, Michael Harry RESIGNED | Director | 07 Jun 1998 | 31 Dec 2010 | United Kingdom | July 1948 | 22 Landen Grove, Wokingham, Berkshire, RG41 1LL |
| FEAVIOUR, Roger St Denis RESIGNED | Director | | 07 Jun 1998 | England | November 1946 | Hazeley House, High Street Chieveley, Newbury, Berkshire, RG20 8UX |
| HOAD, Martin Roger Gregory RESIGNED | Director | 10 Dec 2010 | 01 Nov 2011 | United Kingdom | November 1965 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| JANSSEN, Wynand Frederick RESIGNED | Director | 26 Mar 1999 | 22 Mar 2010 | Australia | December 1950 | 24 York Road, Woonona, Nsw, 2517, Australia |
| KUKURA, Jeffrey Ivan RESIGNED | Director | 16 Sep 1997 | 16 Mar 1999 | | February 1945 | 9a Eulalia Avenue, Point Frederick 2250, Nsw Australia, FOREIGN |
| MILLER, Robert Thomas RESIGNED | Director | 01 May 1995 | 07 Jun 1998 | | February 1949 | 9 Larch Square, Auckley, Doncaster, South Yorkshire, DN9 3LL |
| PREST, Richard Jullion RESIGNED | Director | | 16 Dec 1991 | | May 1946 | Gardens House, Thoresby Park, Newark, Nottinghamshire, NG22 9EH |
| SWAYNE, Anthony William John RESIGNED | Director | 16 Dec 1991 | 07 Jun 1998 | United Kingdom | September 1948 | The Old Vicarage, East Meon, Petersfield, Hampshire, GU32 1PG |