Between 1996 and 2007 he was a Federal Attorney, having held several positions in the government, such as National Secretary of Justice, Director of the Department of Asset Recovery and International Legal Cooperation (DRCI) of the Ministry of Justice, Deputy Attorney General of the Union, member of the Council of Financial Activities Control (COAF) and Coordinator of the National Strategy to Combat Corruption and Money Laundering (ENCCLA), among other positions.

In 2008, he entered the private sector working in the areas of Corporate Criminal, Administrative and International Law and Corporate Ethics.

Ph.D. in International Law from the University of São Paulo (USP), Antenor is also a member of The International Academy of Financial Crime Litigators and an independent Counselor of the Banking Self-Regulation Council of the Brazilian Federation of Banks (FEBRABAN).