Comment by Cthulhu_

Try proving they're rejected because of their nationality. That said, CERN itself does have some official statements on the matter:

- The International Cooperation Agreement has been terminated in 2023, following the invasion of Ukraine (https://international-relations.web.cern.ch/stakeholder-rela...)

- Their recruitment policy states they source among their member states except when they really really can't find someone to fill a position from there (https://careers.cern/recruitment-policy/).

I'm not sure if / how that works together with discrimination laws, however, discrimination is a different subject than nationality I think. I can't just work in the US, not because I'm Dutch but because of visum / labor / market protection / etc laws. And with CERN, added factors to consider are international funding, espionage, sabotage, etc. Some countries may decide to pull funding if CERN were to, for example, continue working with Russia or hire Russians.

tl;dr it's a lot more complicated than discrimination.