Membership of the Greenwich Forum is by invitation only and members represent all aspects of Britain's interests in the world's marine and maritime resources and activities, serving as individuals, giving their time freely and paying a nominal membership fee.
Recently a second level of membership has been introduced called "Friends of the Forum" which gives members who are not able to actively participate in meetings, the opportunity to stay fully informed of the activities of The Greenwich Forum, attend its major events and offer general support.
| PRESIDENT: Sir Robin Knox-Johnston CBE |
| Chairperson | Professor Sarah Palmer | Greenwich Maritime Institute, University of Greenwich |
| Honorary Treasurer | Commander Mike Mason RN (Rtd) | Systems Consultants Services Ltd |
| Members | Dr Bob Allwood | Society for Underwater Technology |
| Judge David Anderson | Formerly of International Tribunal Law of the Sea, Hamburg | |
| Rodney Anderson | R.B. Anderson & Associates | |
| Richard Bateman | Hakluyt Society and Society for Nautical Research | |
| Professor Chris Bellamy | Greenwich Maritime Institute, University of Greenwich | |
| Mark Brownrigg | Chamber of Shipping | |
| Captain Colin Cameron RN | Parliamentary Assembly of WEU | |
| John Carlton | Lloyd's Register | |
| Christopher Carleton MBE | Law of the Sea Division, UK Hydrographic Office | |
| Captain Simon Culshaw | CTS Marine Consultants | |
| Jim Davis CBE | Maritime Industries Forum | |
| Michael Everard CBE | ||
| Richard Fox | Richard Fox & Associates Ltd | |
| Paul Gunton | IHS Fairplay | |
| Professor Steven Haines | Geneva Centre for Security Policy | |
| Rear Admiral Richard Hill | Formerly of The Naval Review | |
| Jim Hind | The Society for Underwater Technology | |
| Dr Alistair Johnson | BAE Systems | |
| James Marsden | Natural England | |
| John Murray | Society for Maritime Industries | |
| Julian Parker OBE | Formerly of The Nautical Institute | |
| Professor Ralph Rayner | London School of Economics | |
| Dr Jon Robb-Webb | King's College London | |
| Sunil Shastri | CEMS, University of Hull | |
| Rear Admiral Michael Stacey CB | Marine Pollution Consultancies | |
| David Whitehead | British Ports Association | |
| Captain Gordon Wilson RN (Rtd) | RUSI and Mountbatten Centre for International Studies, Southampton University | |
| Friends of the Forum | Professor Patricia Birnie | |
| Commander Ian Gallett | ||
| Dr Dougal Goodman | ||
| Lady Elizabeth Kennett | ||
| Professor Alasdair McIntyre CBE | ||
|
Henry Revell |