| 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 | 12 Jun 2014 | | England | December 1966 | Anglia House, 6 Central Avenue, St Andrews Business Park, Norwich, NR7 0HR |
| CIESIELSKA, Katarzyna Jolanta RESIGNED | Secretary | 07 Mar 2013 | 15 Oct 2014 | | | 100, Rue De Volmerange, Dudelange, Luxembourg |
| MORTIMER, Jonathan RESIGNED | Secretary | 10 Oct 2007 | 05 Mar 2013 | | | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| BARRETT, John William RESIGNED | Director | 10 Oct 2007 | 31 May 2010 | England | February 1947 | 6 Blythewood Close, Knowle, Solihull, West Midlands, B91 3HL |
| BUTLER, Geoffrey Doy Hopson RESIGNED | Director | 10 Oct 2007 | 31 Dec 2010 | England | October 1946 | Home Green Heath House Road, Worplesdon Hill, Woking, Surrey, GU22 0QU |
| CUBITT, Michael Harry RESIGNED | Director | 10 Oct 2007 | 31 Dec 2010 | United Kingdom | July 1948 | 22 Landen Grove, Wokingham, Berkshire, RG41 1LL |
| KIMMEL, Mark Edward RESIGNED | Director | 10 Oct 2007 | 01 Oct 2012 | Usa | March 1959 | 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 |
| MACDONALD, Alexander James RESIGNED | Director | 10 Dec 2010 | 26 Nov 2013 | United Kingdom | December 1954 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| MCGALPINE, Christopher RESIGNED | Director | 10 Dec 2010 | 26 Nov 2013 | England | May 1962 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| 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 |
| STUBBS, Graham Martin RESIGNED | Director | 05 Dec 2011 | 01 Jul 2014 | United Kingdom | February 1954 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| SWEENEY, John Joseph RESIGNED | Director | 29 Dec 2020 | 31 Mar 2022 | Luxembourg | October 1952 | Carlton House, Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG, England |
| SWEENEY, John Joseph RESIGNED | Director | 29 Nov 2011 | 01 Jul 2014 | Luxembourg | October 1952 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| WHISTLER, Christopher Claude Lashmer RESIGNED | Director | 10 Oct 2007 | 31 Dec 2020 | England | June 1958 | Harsco House Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG |
| ZAMAN, Shaima RESIGNED | Director | 06 Apr 2022 | 09 Aug 2022 | England | December 1976 | Carlton House, Regent Park, 299 Kingston Road, Leatherhead, Surrey, KT22 7SG, England |