Dear Colleague, The ESA Director of Science is pleased to invite you to respond to the call for expressions of interest to become a member of the Astronomy Working Group (AWG)/Solar System and Exploration Working Group (SSEWG) and/or Space Science Advisory Committee (SSAC). This call is open to all scientists affiliated with institutions in the ESA Member States. The Call, containing the necessary information about the SSAC, AWG and SSEWG, the tasks of the members of each committee/group, and the information needed by proposers, can be found at: https://www.cosmos.esa.int/web/expression-of-interest-for-science-advisory-members-2023 The Call will close on 22 January 2024 at 12:00 hrs (noon) CET. Applications must be submitted electronically to ESA as indicated https://www.cosmos.esa.int/web/expression-of-interest-for-science-advisory-members-2023 We would appreciate if you could circulate this Announcement to interested colleagues within your institute. Yours sincerely, Matt Taylor, on behalf of Prof. Carole Mundell