The following procedure is typically required if your salary is paid out through the University. If you receive a salary through some other channel (ESA for example), not all steps may be required. Please check with your funding agency in that case.
Upon arrival you need to register at the following official agencies
When it comes to immigration routines, foreign nationals are formally divided into two groups, namely EU citizens and non-EU citizens. The group of EU-citizens actually consists of citizens of EU and EEA (European Economic Area) countries (Iceland, Lichtenstein, Norway).
The difference is that EU/EEA citizens are not formally required to obtain a residence permit. Some agencies (insurance, banks, city hall) seem to be unaware of this, and may still ask you to present one to prove you are legally living in The Netherlands. Luckily, this practice is becoming rare. If you so wish, you can obtain a residence permit at a later time. This will cost you 16 euro.