Anyone who works during his/her stay in Switzerland or who remains in Switzerland for longer than three months requires a permit. Residence permits are issued by the Cantonal Migration Offices. A distinction is made between short-term residence permits (less than 1 year), annual residence permits (limited) and permanent residence permits (unlimited).
The conditions applicable for a residence in Switzerland are dependent on both your nationality as well as on the reason for your stay. Switzerland has a dual system for the admission of foreign workers. Gainfully employed nationals from the EU-27/EFTA States can benefit from agreements on the free movement of persons. Only a limited number of management level employees, specialists and other qualified employees are admitted from all other countries.
Official Website:
https://www.sem.admin.ch/sem/en/home/themen.html
Cantonal immigration and labour market authorities:
https://www.sem.admin.ch/sem/en/home/se ... e_und.html