The Executive Committee (UEC) acts as a representative body for the community of users of GSI facilities. They can be addressed with suggestions or problems, and maintain contact with the GSI directors. The UEC meets at least once a year in connection with a G-PAC (former EA) meeting. The UEC meeting will be organized by the Chair.

One-third of the members of the UEC is elected once a year by the members of the Users' Group. The UEC elects among themselves the Chair-elect, who in the next year will serve as Chair, and in the following year as Past Chair. The charter of the GSI Users' Group was written by the UEC and presented to the GSI Users' Group during the committees first term.