Depending on your nationality or the purpose of your stay, a work permit might be required for you.
When coming to the Netherlands to work, the general rule is that the employer will have to apply for a work permit for you if you do not have the nationality of an EU/EEA member state or Switzerland. However, since the Dutch government wants to stimulate its ‘knowledge economy’, scientific researchers are often exempt from this requirement. This is fortunate, as an ordinary (full) work permit is generally quite difficult to acquire.
A work permit under less stringent rules
Most research situations which do not fall under an exemption of the work permit can profit from less stringent rules. Now a work permit is required, however less stringent rules apply for the application procedure. Less stringent rules for example mean that the employer does not need to prove that he could find no suitable person within the EU.
Less stringent rules apply to foreign nationals who work in higher education (researchers, guest lecturers), or other sectors where shortages have been identified. They are not considered a threat to the Dutch labour market, in fact, the opposite is true. The Netherlands needs foreign nationals to fill certain positions in order to keep up or improve our competitive position in certain areas such as research.
In practical terms this means that for these categories it will not be checked if there is a supply of workers available in a category with a higher priority. This saves the future employer a lot of paperwork and time in the application procedure. More importantly, it greatly increases the chance that a work permit will be approved of.
A full work permit
If neither the exemptions nor the less stringent rules apply to your situation, your employer will have to apply for a full work permit. Now it will be checked if there is no supply of suitable workers within the EU which could also do the work.