The current members of HET are (in alphabetic order of country)
- Jens Volkert [1] (Austria)
- Dieter Kranzlmüller [2] (Austria)
- Kimmo Koski [3] (Finland) - chair
- Leif Laaksonen [4] (Finland) - secretary
- Alain Kavenoky [5] (France)
- Alain Lichnewsky [6] (France)
- Achim Bachem [7] (Germany)
- Helmut Löwe [8] (Germany)
- Andreas Reuter [9] (Germany)
- Andy Shearer [10] (Ireland)
- Thibaut Lery [11] (Ireland)
- Fabio Schifano [12] (Italy)
- Piero Vicini [13] (Italy)
- Patrick Aerts [14] (The Netherlands)
- Peter Michielse [15] (The Netherlands)
- Francesc Subirada [16] (Spain)
- Felipe Lozano [17] (Spain)
- Lennart Johnsson [18] (Sweden)
- Marie-Christine Sawley [19] (Switzerland)
- Jane Nicholson [20] (United Kingdom)
- James Penman [21] (United Kingdom)
- Hugh Pilcher-Clayton [22] (United Kingdom)
At present participation to HET is limited, due to practical reasons. Any comments to HET work and the documents in progress are welcome. Input can be delivered through any of the HET members listed above.