Your employer may need to apply for a provisional Residence Permit (mvv) for you. The employer submits an application both for an mvv and a residence permit at the same time.
The IND (Immigration services) assesses the application and notifies your employer/host of the outcome. When it has been granted, the Dutch embassy/consulate will be notified as well.
From that moment on you can collect your mvv from the Dutch embassy.To collect your mvv at the Dutch embassy or consulate you will often need to make an appointment.
You must collect the mvv in person at a Dutch embassy or consulate. It is not possible to authorize somebody else to apply on your behalf. You may visit the nearest Dutch embassy or consulate in your home country. It is also possible to apply at a Dutch embassy or consulate in another country, as long as you have lawful residence in that particular country. Lawful residence means that you have a residence permit for that country, that will be valid for at least another 3 months. If you hold a tourist visa, you do not qualify as a lawful resident.
The embassy or consulate might ask you to show a legalised birth certificate.
The residence permit can be collected after arrival in the Netherlands.
Find out where the nearest Dutch embassy or consulate is located on the Dutch Ministry of Foreign Affairs website.
Also interesting for you: documents for MVV, embassies, before arrival.