Nahuel Grisolía is a security guy from Argentina. He has delivered trainings in a couple of conferences around the world: BugCON (Mexico), H2HC (Brazil), Ekoparty (Argentina), OWASP events (Argentina), etc.
He has discovered vulnerabilities in McAfee Ironmail, VMWare and Manage Engine Service Desk Plus; also in Free Software projects like Achievo, Cacti, OSSIM, Dolibarr and osTicket.
http://www.exploit-db.com/author/?a=2008
https://www.troopers.de/agenda13/troopers13-1-day-workshop-rfid/index.html