1. The European Research Executive Agency (REA) invites experts from a wide range of fields to register in the European Commission’s experts database.
More at the following link
2. The European Climate, Infrastructure and Environment Executive Agency (CINEA) is also currently inviting experts from the fields of climate, energy and transport to register to the European Commission expert’s database.
More at the following https://cinea.ec.europa.eu/programmes/horizon-europe/become-evaluator-eu-research-projects_en