His studies mainly focused on the French intelligence reforms and national security decision-making system. Between 1993 and 1994 Jean-Charles Brisard was legal advisor to the President of French Polynesia Gaston Flosse, before joining the French prime minister office as press assistant to Édouard Balladur, the French prime minister, he was also legislative advisor to Alain Marsaud, former Paris anti-terrorism chief prosecutor.
Jean-Charles Brisard's research centered on French intelligence reforms and national security decision-making systems.  He served as legal advisor to the President of French Polynesia Gaston Flosse from 1993 to 1994, then worked in the office of the French Prime Minister Édouard Balladur as a press assistant. He also provided legislative advice to Alain Marsaud, a former Paris anti-terrorism chief prosecutor.