Does my Luxembourg employer have to advertise the job before hiring me as a salaried worker?

Luxembourg applies a labour market test before a third-country national can be hired for a salaried role. The employer must declare the vacant position to ADEM, the national employment agency. This gives priority to workers already available on the local and EU labour market.

If ADEM cannot find a suitable candidate within roughly three weeks, the employer may request a certificate authorising the recruitment of a third-country national. That certificate is a mandatory prerequisite, and a copy is needed for your authorisation-to-stay application. Without it, the application cannot succeed, so this step should be completed early.