| BYSTROM, Caroline Louise ACTIVE | Secretary | 11 Aug 2026 | | | | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| HAIRE, Georgina Mary-Rose ACTIVE | Director | 23 Jun 2025 | | England | June 1993 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| MCARDLE, Mark Gerard Denis ACTIVE | Director | 02 Mar 2022 | | United Kingdom | June 1987 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| MCKINSTRY, William Francis Michael ACTIVE | Director | 10 Sep 2024 | | United Kingdom | October 1965 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| RAHMAN, Omar Abbas ACTIVE | Director | 23 Jul 2026 | | England | November 1980 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| BURNS, Noel James RESIGNED | Secretary | 09 Mar 2007 | 30 Sep 2008 | | | The Handsel 6 Northcliffe Close, Worcester Park, Surrey, KT4 7DS |
| TRUILLET, Nicolas Alexandre Desire RESIGNED | Secretary | 01 Oct 2008 | 10 Aug 2026 | | | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| HACKWOOD SECRETARIES LIMITED RESIGNED | Nominee Secretary | 25 May 2005 | 09 Mar 2007 | | | One Silk Street, London, EC2Y 8HQ |
| BHATIA, Kanishk RESIGNED | Director | 13 Sep 2011 | 15 Jan 2014 | United Kingdom | December 1982 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| BOTIJA, Antonio RESIGNED | Director | 08 Feb 2017 | 12 Apr 2017 | United Kingdom | October 1976 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| BUTLER, Paul RESIGNED | Director | 09 Mar 2007 | 20 Dec 2010 | England | March 1961 | 6 Masefield View, Orpington, Kent, BR6 8PH |
| COTE, Patrick RESIGNED | Director | 28 Jan 2014 | 29 Oct 2014 | France | September 1972 | South East Water, Rocfort Road, Snodland, Kent, ME6 5AH, England |
| DIXON, Peter Vincent RESIGNED | Director | 28 Jan 2014 | 27 Apr 2017 | United Kingdom | May 1960 | Rocfort Road, Snodland, Kent, ME6 5AH, England |
| DREW, Rachel Amelia RESIGNED | Director | 16 Jul 2018 | 04 Apr 2023 | New Zealand | June 1976 | 35, Hrl Morrison & Co (Uk) Limited, New Bridge Street, London, EC4V 6BW, England |
| FORTIN, Olivier Georges Xavier RESIGNED | Director | 29 Oct 2014 | 08 Feb 2017 | France | March 1974 | 30 Avenue Georges V, 75008 Paris, France |
| JORDAN, Stephen Francis RESIGNED | Director | 16 Jul 2018 | 17 Dec 2019 | England | July 1980 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| KHAKHAR, Rajiv RESIGNED | Director | 17 Dec 2019 | 02 Mar 2022 | United Kingdom | August 1984 | Level 10, Nova North, 11, Bressenden Place, London, SW1E 5BY, England |
| LE GAL, Anne Noelle RESIGNED | Director | 18 Jun 2021 | 01 Mar 2023 | England | December 1983 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| LE GAL, Anne-Noelle Noelle RESIGNED | Director | 16 Jan 2024 | 10 Sep 2024 | England | December 1983 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| LE GAL, Anne-Noelle Noelle RESIGNED | Director | 08 Feb 2017 | 05 Mar 2019 | England | December 1983 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| LEROUX, Jean-Etienne RESIGNED | Director | 05 Jan 2011 | 26 Feb 2014 | Canada | July 1978 | Caisse De Depot Et Placement Du Quebec, 1000 Place Jean-Paul-Riopelle, Montreal, Quebec, Canada |
| LÜSCHEN, Gregor Sebastian RESIGNED | Director | 04 Apr 2023 | 23 Jun 2025 | England | November 1988 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| MAXWELL, Gordon Walker RESIGNED | Director | 09 Mar 2007 | 20 Dec 2010 | England | April 1953 | Penolver House, 56 Cockney Hill, Reading, Berkshire, RG30 4EU |
| MINGUELL MARIA, Pere RESIGNED | Director | 01 Mar 2023 | 23 Jul 2026 | England | September 1993 | 50. 2nd Floor, St. Mary Axe, London, EC3A 8FR, England |
| OUELLET, Jean Pierre RESIGNED | Director | 24 Jul 2013 | 08 Feb 2017 | Canada | January 1948 | Caisse De Depot Et Placement Du Quebec, 1000 Place Jean-Paul-Riopelle, Montreal, Quebec H2z 2b3, Canada |
| POOLE, Timothy Michael RESIGNED | Director | 18 Aug 2005 | 15 Jun 2007 | Australia, Victoria | March 1969 | 28 Adams Street, South Yarra, Victoria 3141, Australia |
| RAHMAN, Omar Abbas RESIGNED | Director | 24 Sep 2024 | 23 Jul 2026 | England | November 1980 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| RANKINE, Steven John RESIGNED | Director | 20 Dec 2010 | 12 Sep 2011 | Uk | February 1960 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| RIDLEY, David Andrew RESIGNED | Director | 18 Dec 2007 | 07 May 2008 | | April 1965 | Flat 2, 30 Holland Park Gardens, London, W14 8EA |
| ROSATI, Valeria, Ms RESIGNED | Director | 13 Sep 2021 | 01 Mar 2023 | United Kingdom | February 1975 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| ROSATI, Valeria, Ms RESIGNED | Director | 02 May 2018 | 16 Jul 2018 | United Kingdom | February 1975 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| ROSATI, Valeria, Ms RESIGNED | Director | 22 May 2008 | 14 Sep 2016 | United Kingdom | February 1975 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| SCHUBERT, Oliver Jan RESIGNED | Director | 12 Apr 2017 | 16 Jan 2024 | United Kingdom | June 1972 | 2nd Floor, 50 St Mary Axe, London, EC3A 8FR, England |
| STIMPSON, Joanne Elizabeth RESIGNED | Director | 09 Mar 2007 | 20 Dec 2010 | England | August 1962 | The Garden House, 18 Heathway Blackheath, London, SE3 7AN |
| SZCZEPANIAK, Marissa Ann RESIGNED | Director | 05 Mar 2019 | 18 Jun 2021 | England | December 1980 | South East Water Limited, Rocfort Road, Snodland, Kent, ME6 5AH |
| SZCZEPANIAK, Marissa Ann RESIGNED | Director | 14 Sep 2016 | 16 Jul 2018 | England | December 1980 | 2nd Level, 50 St Mary Axe, London, EC3A 8FR, England |
| TAYLOR, Peter Nolan RESIGNED | Director | 09 Mar 2007 | 18 Dec 2007 | | January 1972 | 187-199 Boundary Road, Narre Warren North, Victoria 3804, Australia |
| HACKWOOD DIRECTORS LIMITED RESIGNED | Nominee Director | 25 May 2005 | 18 Aug 2005 | | | One Silk Street, London, EC2Y 8HQ |