Óscar Fonseca graduated in Biochemistry and has a Master's in Clinical Biochemistry, both from the University of Aveiro. Óscar developed his Master's thesis on the mechanisms of bone loss during Mycobacterium avium infection, in the Host Targets of Infection Group at the Instituto de Investigação e Inovação em Saúde (i3S). Since October 2022, Óscar works as a research fellow in the IronIC project, focused on the alterations of iron distribution and metabolism during infection.