Czech Republic - Work Skills & Ancestry - Work Permit
In order to apply for a Work Permit, the employer needs to initiate the process, then the position is posted for 30 days, and if no suitable person is found, the Work Permit is granted. With that, the 3rd-Country National can then apply for a Visa for work purposes. The total process may take 3-4 months.
If a 3rd-Country National loses his job, then immediately the Work Permit expires and he has 3 days to announce this to the Foreign Police.