| SMITH, Graham Richard ACTIVE | Secretary | 15 Oct 2014 | | | | Anglia House 6 Central Avenue, St. Andrews Business Park, Norwich, NR7 0HR |
| COOPER, Stephen Richard ACTIVE | Director | 25 Apr 2014 | | England | December 1966 | Anglia House 6 Central Avenue, St. Andrews Business Park, Norwich, NR7 0HR |
| CIESIELSKA, Katarzyna Jolanta RESIGNED | Secretary | 04 Jun 2014 | 15 Oct 2014 | | | 100,, Rue De Volmerange, Dudelange, Luxembourg |
| GOULDING, Graham Thomas RESIGNED | Secretary | 01 Aug 2001 | 25 Apr 2003 | | | 126 Auckland Road, London, SE19 2RP |
| MACDONALD, Alasdair James RESIGNED | Secretary | 27 May 2003 | 04 Jun 2014 | | | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| REID, Robert Andrew Wilson RESIGNED | Secretary | 16 Feb 2001 | 30 Mar 2001 | | | Dunmore, Gryffe Road, Kilmacolm, Inverclyde, PA13 4BA |
| BRIAN REID LTD. RESIGNED | Nominee Secretary | 28 Sep 2000 | 16 Feb 2001 | | | 5 Logie Mill Beaverbank Office Park, Logie Green Road, Edinburgh, EH7 4HH |
| BURNS, Roderick RESIGNED | Director | 10 Dec 2010 | 03 Oct 2011 | England | December 1966 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| CUBITT, Michael Harry RESIGNED | Director | 27 May 2003 | 18 Jun 2003 | | July 1948 | 22 Camellia Way, Simons Park, Wokingham, Berkshire, RG41 3NB |
| MACDONALD, Alasdair James RESIGNED | Director | 30 Mar 2001 | 25 Apr 2014 | United Kingdom | December 1954 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| MAGGS, Peter Andrew RESIGNED | Director | 30 Mar 2001 | 28 Feb 2006 | | June 1948 | 20 Dunchattan Grove, Troon, Ayrshire, KA10 7AT |
| MCGALPINE, Christopher RESIGNED | Director | 10 Dec 2010 | 16 Jun 2014 | England | May 1962 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| MOUATT, Kevin Clifford RESIGNED | Director | 30 Mar 2001 | 27 May 2003 | | April 1961 | 47 Hartley Down, Purley, Surrey, CR8 4EF |
| O'KELLY, Paul Brian RESIGNED | Director | 10 Dec 2010 | 05 Dec 2011 | United Kingdom | December 1957 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| REID, Cameron James RESIGNED | Director | 16 Feb 2001 | 25 Apr 2014 | England | December 1973 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| REID, Robert Andrew Wilson RESIGNED | Director | 16 Feb 2001 | 01 Oct 2004 | | April 1945 | Dunmore, Gryffe Road, Kilmacolm, Inverclyde, PA13 4BA |
| REITEMEIER, Christophe Nicolas RESIGNED | Director | 06 Nov 2020 | 01 Aug 2023 | England | December 1965 | Carlton House, Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG, England |
| SHINE, Stephen Frank RESIGNED | Director | 19 Jun 2003 | 31 Dec 2006 | England | March 1957 | Lethread, Cherkley Hill, Leatherhead, Surrey, KT22 8LA |
| SWEENEY, John Joseph RESIGNED | Director | 03 Oct 2011 | 01 Jul 2014 | Luxembourg | October 1952 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| WHISTLER, Christopher Claude Lashmer RESIGNED | Director | 16 Jun 2014 | 31 Dec 2020 | England | June 1958 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| STEPHEN MABBOTT LTD. RESIGNED | Nominee Director | 28 Sep 2000 | 16 Feb 2001 | | | 14 Mitchell Lane, Glasgow, G1 3NU |