Ireland has officially become an Associate Member State of CERN, effective 22 October 2025, after completing all necessary steps to ratify the Associate Membership Agreement and accede to the protocol on CERN’s privileges and immunities. This milestone marks a new chapter in the longstanding collaboration between Ireland and the world’s leading particle physics laboratory. The agreement was initially signed in May 2025 by CERN Director-General Fabiola Gianotti and James Lawle