Houses in Lisbon for Expat

Dear All,

I'm a portuguese citizen, living in Lisboa. I'm trying to get to multinational companies in Portugal that rent houses/flats to expats working in Lisbon during a short/medium period of time.

I have flat in City Centre, totally renewed and I want to make it available to companies in Portugal to rent to their expat workers.

Does anyone know what do I have to do to reach them?

Thanks in advance.

Best regards.