Earlier quoted context omitted.
You're throwing a lot of words that you don't understand nor have much relevance to the topic. Before bilateral agreements and the freedom of movement, not Schengen which was ratified much later and is completely irrelevant here, you needed a work permit , not a visa (lowercase), which anyway at CERN is the equivalent of a diplomatic permit given to all international and tax-exempt NGOs in Geneva/Switzerland. And of…
Getting a B permit in 2003 - 2004 was indeed hard enough experience that I ended up not staying there and refuse any job offer from Swiss companies to this day, regardless of the Swiss friendships I managed to make there. My stay at CERN was temporary, and every single company where I had an interview clearly communicated to me that the paperwork to get a B permit instead of a Swiss national, or a foreigner with exis…
Words have a meaning and bringing diplomatic permits to the topic when they follow their own rules and are specifically outside any immigration quota is not particularly helpful.