| Freek De Wit | Director | 1 Feb 2000 | 24 Jan 2001 | Dutch | 77 years |
| Hugh David Wellesley Hoggard | Director | 17 Jun 1992 | 20 Aug 1992 | British | 103 years |
| Huibert Groenewoud | Director | 24 Jan 2001 | 4 May 2011 | Dutch | 79 years |
| Jacob Ridder | Director | 14 Apr 1992 | 13 May 1992 | Dutch | 88 years |
| Johannes Boender | Director | 1 Jul 1995 | 20 Jan 2000 | Dutch | 75 years |
| John Gilbert | Director | 8 Sept 2004 | 26 May 2005 | British | 80 years |
| John Scott Peer | Director | 20 Aug 1992 | 31 Jul 1997 | British | 91 years |
| Joseph Bartholomeus Everardus Maria Athmer | Director | 8 Sept 2004 | 26 May 2005 | Dutch | 71 years |
| Jurjan Pieter Cornelis Blokland | Director | 8 Feb 2018 | 9 Oct 2020 | Dutch | 52 years |
| Mark Raymond Warrell | Secretary | 14 Apr 1992 | 20 Aug 1992 | British | - |
| Martin Reilly Drury | Director | 20 Aug 1992 | 31 Jan 2014 | British | 84 years |
| Maurits Den Broeder | Director | 4 May 2011 | 1 Dec 2017 | Dutch | 53 years |
| Peter Barry Woolnough | Secretary | 20 Aug 1992 | 26 Jul 2002 | British | - |
| Robert Cornelis Willem Brouwer | Director | 14 Apr 1992 | 20 Aug 1992 | Dutch | 85 years |
| Servaas Adrianus Van Den Hout | Director | 20 Aug 1992 | 1 Jul 1995 | Dutch | 87 years |
| Simon John Russell | Director | 1 Aug 1997 | 31 Dec 2006 | British | 75 years |
| Timothy William Brett | Director | 20 Aug 1992 | 20 Jan 1994 | British | 88 years |
| Willem De Jong | Director | 14 Apr 1992 | 9 May 1992 | Dutch | 84 years |