The composition of the ECA Executive Committees since its foundation in 1997 was as follows:
- 1997-2000: C. Giacovazzo (President), J. Bernstein (Vice-President), P. Beurskens (Secretary), S. Harkema (Treasurer), Officers: F. Allen, M. A. Carrondo, P. Pautler
- 2000-2003: C. Lecomte (President), P. Beurskens (Vice-President), G. Filippini (Secretary), M. T. Duarte (Treasurer), Officers: E. Dodson, M. Jaskolski, D. Viterbo
- 2003-2006: H. Fuess (President), M. Jaskolski (Vice-President), C. Lecomte (Past-President), G. Filippini (Secretary), M. T. Duarte (Treasurer), Officers: A. Liljas, A. Roodt, C. Wilson
- 2006-2009: J. Helliwell (President), S. Larsen (Vice-President), H. Fuess (Past-President), P. Bombicz (Secretary), Radomir Kuzel (Treasurer), Officers: S. Garcia Granda, L. van Meervelt, A. Roodt, M. Nespolo
- 2009-2012: S. Garcia-Granda (President), A. Roodt (Vice-President), J. Helliwell (Past-President), P. Bombicz (Secretary), Radomir Kuzel (Treasurer), Officers: L. van Meervelt, A. Bacchi, W. Depmeier, M. Nespolo
- 2012-2015: A. Roodt (President), A. Bacchi (Vice-President), S. Garcia-Granda (Past-president), G. Rosair (Secretary), C. Lehmann (Treasurer), Officers: J. Hadermann, U. Heinemann, O. Yakubovich, F. Otalora
- 2015-2018: A. Bacchi (President), U. Heinemann (Vice-President), A. Roodt (Past-President), G. Rosair (Secretary), C. Lehmann (Treasurer), Officers: J. Hadermann, C.-H. Gorbitz, M. Đaković, F. Otalora
- 2018-2021: U. Heinemann (President), M. Đaković (Vice-President), A. Bacchi (Past-President), A. van der Lee (Secretary), J. Overgaard (Treasurer), Officers: J. Dohnálek, C.-H. Gørbitz, D. Haynes, C. Tedesco
- 2021-2024: M. Đaković (President), A. van der Lee (Vice-President), U. Heinemann (Past-President), A. Maloney (Secretary), 2021-2022: J. Overgaard (Treasurer), 2022-2024: A. Neels (Treasurer), Officers: J. Dohnálek, K. Hradil, D. Haynes, C. Tedesco