Sami Souissi has been very active in the international community at different levels. The list of contributions and services are not exhaustive but given as examples:

Member of International Scientific Associations: the World Association of Copepodologists (WAC), the European Geophysical Union (EGU) and others.

Member of the executive committee of the World Association of Copepodologists (WAC) 2002-2005 (nominated) and 2005-2008 (elected).

Responsible of International Relations for the department Marine Station of Wimereux (2002-2018) and for the Laboratory of Oceanology and Geosciences – UMR 8187 LOG (2008-2018)

External reviewer (expert) for international Master and Ph.D. defence committee (Tunisia (3), Spain (2), Belgium (1), Scotland (1), Taiwan (3), Italy (3), Algeria (1), Philippines (2), Australia (1)).

Associate Editor in the journal Frontiers in Marine Science – Marine Pollution Section ; guest editor for special issues and research topics and reviewer for more than 60 International Scientific Journals.

Co-organizer of the pre-conference workshop, ‘training course in the biology and systematics of copepods’ co-sponsored by the European Network of Excellence MARBEF, 4-8 July, 2005, University of Bizerte, Tunisia.

Local chairman and co-organizer of the 9^th International Conference on Copepoda, 11-15 July 2005, Hammamet, Tunisia.

Co-organizer of the Estuarine workshop with emphasis on zooplankton, the drainage basin approach and restoration ecology. Can we benefit from a multi – estuaries approach? 14-16 September 2006, Boulogne sur mer (Nausicaa), France.

Member of the scientific committee and invited speaker of the conference ‘Water and Climate Change’ (14-15 October 2008, Antwerpen, Belgium).

Organizer of the international symposium ‘Climate Change Impacts on Estuarine and Coastal Ecosystems: a Zooplankton Perspective’ organized in Boulogne sur mer (ww.nausicaa.fr), France, June 28-30, 2010.

Organizer of the opening symposium and invited keynote speaker in the 12^th International Conference on Copepoda, July 14-18, 2014, Seoul, South Korea.

Member of the Scientific committee of the 10^th Baltic Sea Science Congress “Science and innovation for future of the Baltic and the European regional seas”, 15-19 June 2015, Riga, Latvia.

Responsible for several international bilateral and network research programs (with Germany, Latvia, Denmark, Switzerland, Russia, Taiwan, Japan, Philippines, South Korea, USA, Canada, Québec, Tunisia & Algeria)