LLB degree from the University of São Paulo (USP) (1966). Specialisation in tax law from the USP. LLM degree in economics and financial law from the USP. Member of the Lawyers Institute of São Paulo, the Academy of Law in São Paulo, Brazilian Academy of Tax Law, Judicial Council of the Federation of Industries of Sao Paulo State (FIESP), CAEFT - Board of Advanced Studies in finance and taxation, and member of the advisory board of the Brazilian Institute for Ethical Competition (ETCO), former chairman and current member of the International Academy of Law and Economics. Professor of tax law at USP. Has had several papers published. Founder and owner of Dias de Souza Advogados Associados.