Luís Mendão concluded his studies in biochemistry in 1983 at the University Pierre et Marie Curie, in Paris.
Luís Mendão is currently Chair of the Board of GAT –Treatment Activist Group, an NGO founded in 2001 and working in prevention, early diagnosis, treatment and care of HIV/AIDS, viral hepatitis and tuberculosis focus on key populations. He is also the founder and on the Board of Directors of the AntiProhibitionist Association (SOMA-APA).
Luís Mendão is a member of the European AIDS Treatment Group (EATG), of which he was Chair of the Board. In was also Co-chair of the HIV/ADIS Civil Society Forum of the European Union.
Luís Mendão also integrates the Steering Committee of the VIH Portugal (conference) initiative.
In the last ten years, it has been community consultant of the Regional Office of the World Health Organization Europe (WHO Europe), EMCDDA and ECDC.
Luís Mendão was diagnosed with HIV and HCV in 1996.