| COOPER, Stephen Richard ACTIVE | Director | 12 Jun 2014 | | England | December 1966 | 1020, Eskdale Road, Winnersh, Wokingham, Berkshire, RG41 5TS |
| WHISTLER, Christopher Claude Lashmer ACTIVE | Director | 10 Dec 2010 | | England | June 1958 | 1020, Eskdale Road, Winnersh, Wokingham, Berkshire, RG41 5TS |
| CUBITT, Michael Harry RESIGNED | Secretary | 17 Feb 1998 | 31 Dec 2010 | | | 22 Landen Grove, Wokingham, Berkshire, RG41 1LL |
| OAKES, Paul RESIGNED | Secretary | 31 Dec 2010 | 30 Jun 2018 | | | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| TRUSEC LIMITED RESIGNED | Nominee Secretary | 26 Jan 1998 | 17 Feb 1998 | | | 35 Basinghall Street, London, EC2V 5DB |
| BUTLER, Geoffrey Doy Hopson RESIGNED | Director | 17 Feb 1998 | 31 Dec 2010 | England | October 1946 | Home Green Heath House Road, Worplesdon Hill, Woking, Surrey, GU22 0QU |
| CAMPANARO, Leonard Anthony RESIGNED | Director | 17 Feb 1998 | 31 Jul 2000 | | May 1948 | 1704 Olmstead Way East, Camp Hill, Pennsylvania, 17011845, Usa |
| CUBITT, Michael Harry RESIGNED | Director | 31 Jul 2000 | 31 Dec 2010 | United Kingdom | July 1948 | 22 Landen Grove, Wokingham, Berkshire, RG41 1LL |
| FAZZOLARI, Salvatore Domenico RESIGNED | Director | 17 Feb 1998 | 23 Feb 2012 | United States | August 1952 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| HATHAWAY, Derek Charles RESIGNED | Director | 17 Feb 1998 | 18 Dec 2007 | | May 1944 | 7 Northwatch Lane, Mechanicsburg, Pennsylvania, PA17055, Usa |
| 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 |
| LECLERCQ, Herve Michal RESIGNED | Director | 03 Oct 2011 | 16 Dec 2013 | United Kingdom | June 1962 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| NAVARRA, Stephane RESIGNED | Director | 10 Dec 2010 | 30 Sep 2011 | France | August 1966 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| ROWE, Drusilla Charlotte Jane RESIGNED | Nominee Director | 26 Jan 1998 | 17 Feb 1998 | | April 1961 | Flat E, 13 Saint Georges Drive, London, SW1V 4DJ |
| STUBBS, Graham Martin RESIGNED | Director | 10 Dec 2010 | 01 Jul 2014 | United Kingdom | February 1954 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| TILMOUTH, Graeme Croft RESIGNED | Director | 03 Oct 2011 | 08 Feb 2013 | England | July 1957 | Harsco House, Regent Park, 299 Kingston Road Leatherhead, Surrey, KT22 7SG |
| ZUERCHER, Eleanor Jane RESIGNED | Nominee Director | 26 Jan 1998 | 17 Feb 1998 | | August 1963 | 26 Springfield Road, Linslade, Leighton Buzzard, Bedfordshire, LU7 7QS |