U.O. Home


    Welcome to the Users Office

    Our mission is to welcome, register and provide support to CERN’s guest scientists.

    We are responsible for the contracts with CERN and handling Host-State documentation of the Associated Members of the Personnel
    (Users, COAS and VISCs).

    On this website you will find links to several resources and services provided by CERN. 


    NOTICES:  1. The Users Office will exceptionally be closed on Tuesday 28th March 2023 in the morning.

    2. Route de Meyrin closed on the nights of 27 March to 4 April.


    > Support to those affected by the war in Ukraine : click here.  > Support to MPAs affiliated to Russian and Belarusian institutes (including JINR): click here


    In case of difficulties at the borders, immigration authorities of the Schengen area may contact:

    > for Switzerland, the International Security Police at Geneva Airport, tel. +41 22 427 58 30 (until midnight) or tel. n° +41 22 427 92 20 (24 hours a day): more information here.

    > for France, the Protocol of the Ministry for Europe and Foreign affairs, tel. +33 (0)1 53 69 30 20 (diplomatic privileges and immunities) / +33 (0)1 53 69 37 69 (consular privileges and immunities), on working days and hours: more information here.

    Visa - Pre-registration - Insurance - Accommodation - Cost of living and adequate resources - Culture
    Access to the site - Computing account - Courses - Rules and regulations - Onboarding - CERN services
    CERN services and amenities - Practical information on life in France and Switzerland
    Health insurance - Social security
    Initial application - Renewal - Loss and theft - Cancellation
    Online declaration of changes via EDH - Termination