The Mercosur agreement allows nationals from the member countries to request residency in Peru so they are authorized to work.
MERCOSUR VISA REQUIREMENTS
Assignees from Mercosur countries (see list below) who have a clean criminal record can request a Change of status in Peru. They will be allowed a 2 years residency and they will be allowed to work in Peru. Afterward, the Mercosur foreign resident can apply for the Permanent Residency.
Mercosur countries eligible for Peruvian Residence: