Joining partner who's a scientific researcher (work permit exempt)

Hello there,

Greetings!
I am an Indian national living in The Netherlands (I came to study and have graduated). I plan to join my wife (Indian) who lives in Brussels and works as a scientific researcher. As a researcher, she does not need a work permit by the employer (in this case the university research institute) and thus has no specific work permit.
She has registered in the commune and holds a Residence Permit (type A). She has been working since Aug 2017 and has a determinant contract.
When I join her, how & what kind of documentation do I need to formally register and start living in BE?

Your suggestions/feedback will be much appreciated!
Thanks for your time!

your case is is same as any normal family reunification application. there are many threads in this forum discussing the documentation requirements.