| AEBERHARD, Andreas Christoph ACTIVE | Director | 30 Oct 2020 | | Switzerland | February 1974 | Unterholz 14a, Wangen An Der Aare, 3380, Switzerland |
| HALTER, Matthias ACTIVE | Director | 30 Oct 2020 | | Switzerland | October 1974 | Kirschenackerweg 10 Ittigen, Ittigen, Bahnhof, 3063, Switzerland |
| HUNT, David ACTIVE | Director | 01 Oct 2017 | | England | April 1975 | Wavensmere Farm Barns, Wawensmere Road, Wootton Wawen, Henley-In-Arden, West Midlands, B95 6BP, England |
| BROWN, Robert Stephen RESIGNED | Secretary | 10 Dec 2001 | 29 Nov 2013 | | | Bearley, Stratford Upon Avon, Warwickshire, CV37 0TY |
| SNUGGS, Philip RESIGNED | Secretary | | 28 May 2001 | | | Candle Cottage Coombe Street, Pen Selwood, Wincanton, Somerset, BA9 8NF |
| APPERLEY, Malcolm Geoffrey RESIGNED | Director | 29 Nov 2013 | 01 Oct 2017 | Uk | February 1950 | Wavensmere Farm Barns, Wawensmere Road, Wootton Wawen, Henley-In-Arden, West Midlands, B95 6BP, England |
| BALSIGER, Marc RESIGNED | Director | 29 Nov 2013 | 01 Sep 2016 | Switzerland | March 1969 | Ammann Schweiz Ag, Eisenbahnstrasse 25, Ch-4901 Langenthal, Switzerland |
| BOSSHARD, Urs RESIGNED | Director | 14 Feb 1997 | 12 Oct 1998 | | November 1952 | Guellennwer 14, Aarwangen, Switzerland, 4912 |
| BROWN, Robert Stephen RESIGNED | Director | 01 May 2003 | 29 Nov 2013 | England | February 1960 | Bearley, Stratford Upon Avon, Warwickshire, CV37 0TY |
| EGLI, Elmar Johann RESIGNED | Director | 01 May 2003 | 26 Feb 2009 | | March 1961 | Taubeuwey 2, Ohergerlafingeu, 4564, Switzerland |
| EGLI, Elmar Johann RESIGNED | Director | 12 Oct 1998 | 31 May 2002 | | March 1961 | Taubeuwey 2, Ohergerlafingeu, 4564, Switzerland |
| HOLZ, Bernd RESIGNED | Director | 26 Aug 2018 | 30 Oct 2020 | Germany | January 1964 | Ammann Verdichtung Gmbh, Josef-Dietzgen-Strasse 36, Hennef, Nordhein-Westfalen, 53773, Germany |
| JENNY, Rolf RESIGNED | Director | | 14 Feb 1997 | | November 1948 | Vogelsangstrasse 6, Leich Ch-6205, FOREIGN, Switzerland |
| KEOGH, Colin Denis RESIGNED | Director | | 11 Dec 1998 | United Kingdom | July 1953 | The Manor Farm, North Oakley, Tadley, Hampshire, RG26 5TT |
| LEWIS, Andrew Peter RESIGNED | Director | 01 Aug 1993 | 30 May 2003 | | November 1953 | 26 Oolite Grove, Bath, Somerset, BA2 2UF |
| PIRKLBAUER, Herbert RESIGNED | Director | 21 Sep 2016 | 26 Aug 2018 | Austria | November 1957 | Ammann Schweiz Ag, Eisenbahnstrasse 25, 4900 Langenthal, Switzerland |
| SCHNEIDER-AMMANN, Johann-Niklaus RESIGNED | Director | | 14 Feb 1997 | | February 1952 | Langenthal, Langenthal 4900, Switzerland |
| SEGLIAS, Sascha Niccolo RESIGNED | Director | 01 Sep 2016 | 30 Oct 2020 | Switzerland | August 1969 | 25, Eisenbahnstrasse, Langenthal, Switzerland |
| WRIGHTON, Kenneth Hedley RESIGNED | Director | | 31 Jul 1993 | | June 1929 | Garle House, Stanton St Quintin, Chippenham, Wiltshire |