The ESSC members are drawn from reputed experts active in all  fields of space research on the basis of scientifc expertise and recognition within the community. ESSC’s impact is based on the unbiased expertise, international reputation and reach of its members. These senior space experts are not appointed as representatives of national institutions; however they are required to maintain strong ties with ESSC Funding Organisations and their national space agencies. They offer their understanding and competence in the  field of space science and policy.

The Committee’s four panels (Astronomy and Fundamental Physics, Earth Sciences, Life and Physical Sciences, Solar System and Exploration) reflect the variety of space-related disciplines.