When you come to work full-time at the University of Antwerp in Belgium, you will receive compulsory social security in Belgium. This means that you will accumulate pension rights in Belgium. You may also be entitled to Belgian child benefit, unemployment compensation after severance and sickness and disability benefits.
There are exceptions for researchers from non-EU/EEA countries with which Belgium has no bilateral agreement (partial social security). Social security is also subject to change in the case of part-time employment in more than one country. This depends on the place, the employment rate and the type of employment in each country.
Are you employed by the University of Antwerp and also working in a country other than Belgium? Inform your HR officer from the Human Resources Department so that your salary can be calculated correctly.