Zoltan (@zh4ck) is the Chief Technology Officer at MRG Effitas, a company focusing on AV testing.

Before MRG Effitas, he worked for 5 years in the financial industry as an IT Security expert, and for 2 years as a senior IT security consultant at one of the Big Four companies. His main expertise areas are penetration testing, malware analysis, computer forensics and security monitoring. He released the Zombie browser tool, consisting of POC malicious browser extensions for Firefox, Chrome and Safari. He has been invited to present at information security conferences worldwide including Hacker Halted USA, OHM, Hacktivity, Ethical Hacking, Defcamp.

He is a proud member of the gula.sh team, 2nd runner up at global Cyberlympics 2012 hacking competition.